Browneyes, you don't need to apologize. I know you miss your brother and feel alone. Even though your doctor is out of town, maybe there is another doctor in that group or a number you can call to see an available doctor who will be covered by your insurance. I think it's important that you see someone and talk about your feelings.
I think a good start is to talk to your boyfriend when he gets home. Then please find a number to a doctor covered by your plan. But like Sadie said, if you cannot find someone, you can call your mental health center.
Everything will be ok. We all get overwhelmed with life from time to time. The important thing is getting help when you need it.