. I didn't think of that. Hopefully it's not RA, but still better than cancer.
Nodules can be a lot of things. No sense in listing them all.
What you have is an "incidental finding", i.e. something found when looking for something else. Many of us are walking around with things we know nothing about, but most don't mean much. My mother had an incidental finding of a lesion on her pancreas a few years back. Getting that phone call took my breath away, let me tell you. We had it worked up, and it turned out to be nothing, and here she is still going strong at almost 91. So keep that in perspective. A lung finding during the course of, or after, a serious respiratory illness would not be unusual. I doubt a lot would be done without watching it first, as you heal. (Since something like a biopsy could have risks.) A baseline CT would probably be prudent, but it's really not emergent.
I have only gone to Urgent Care for all of these visits. At one point in the whole illness, I did try to get in to see my primary, but there was nothing available (this is when I was on Day 9 of fever from influenza, so I went to UC for that, and that dr diagnosed bronchitis. I also would have gone to my PCP for this increased pain (to put it mildly) from the rib, but that happened on a Saturday (I'd had the pain for over a week but it got much worse on Saturday).
When I called the PCP today to follow up in the call I'd had from the UC nurse, I at first talked to a secretary, then I believe a nurse. When the nurse told me the soonest appt was next Monday, I said, "Do you think (my doctor) might want to send me for a CT now, before the appt, so we might have the results of that for the appt next week? The nurse at Urgent Care said I'd need a chest CT". The nurse said she'd leave a message for the dr about it, and if the doctor wants to do that or see me sooner she'll call. So far I haven't heard anything. Supposedly all the results from my walk in visit should be in the system for my PCP to see, since it's the same network, but I know it doesn't always happen (my mom has run across this problem with the same network and other specialists not getting reports)
Ok, time to step back a bit. You are a PT so you know this, but I know you're super nervous.

(That happens when it's yourself or someone you care about; helps give us perspective on what our patients go through!)
First, if you can't get in to see your PCP during a health crisis, then it's time to get a new PCP where they can see you in reasonable time. Urgent care centers aren't the best places to go for good, consistent care. I think an ER at a good hospital would've been a better choice - if you couldn't see your PCP - when you heard the pop. (Better yet, seeing your PCP before that, as advised by people on your older thread, would've been the best choice. Your PCP knows you and will follow up with you. You know the quality of care since you selected him or her and the office, etc.)
So where to go from here? IMO you need to get in to see your PCP. Make it happen - that is what they are there for. Call the clinical practice manager if you have to, but they should have an RN who triages calls. "Not sure" if it was a nurse you were speaking to is just not ok. You have to know your practice and how it operates for "emergencies". I would be shocked if they didn't have a process in place for that. (Not that this is an emergency, necessarily, but seeing that this has been going on for a while, and you are now almost in a panic about it, as well as still in severe pain, warrants an urgent visit with your OWN PCP.)
Your doctor will not order a CT based on hearsay. That would not be the standard of care. He will order a CT based on the details of your case, when he sees you. Your doctor is accountable for how he treats you - this includes actually seeing you when you need him, and ordering tests when and if they're indicated. He'll make that decision when he sees you. Now get on the phone, or go there in person, and get an appointment for today or sometime early this week. Stay calm, don't threaten or anything, just be firm. If you absolutely can't be seen, then I'd say an ER visit is warranted, mainly for the pain issue. Don't expect a CT unless they find something that causes it to be warranted - the pain alone may do it, I doubt they'd do it based on the "lesion" seen at UC. Good luck.