Well, if you're only 24, you're hardly over the hill yet as far as childbearing is concerned. Heck, I didn't even get married until I was almost 30!!!!! As far as your family is concerned, tell them to mind their own business!
Your irregular periods may contribute to fertility issues. Perhaps you should see a reproductive endocrinologist, if you haven't already. I know you're reluctant to get all crazy with medical stuff and fear being completely focused on reproductive issues to the exclusion of evrything else, but often, a reproductive problem has a very simple solution. Not all of them are "go right to IVF" or other complicated procedures. Sometimes all it takes is a pill, or some monitoring to determine what's happening when. If you are already aware of some "cycle" problems, you're ahead of the game.
As far as infertiltiy treatment goes, DH and I went through it for 6 years. Unfortunately, we were unable to have children, despite numerous interventions and procedures. However, we were very careful not to let it rule our lives. I was vigilant about not getting crazed by temp taking etc, and when I felt that it was becoming a problem, we would back off for a while. While we are disappointed at not having children, it is not the end of life. There are many ways to be important in the life of a child besides being a parent, and there are times when a child needs someone who is a trusted adult other than a parent to turn to. I know our siblings and friends have always been happy to know that their children felt comfortable enough around us that they would turn to us with a problem, if they were for some reason fearful of going to their parents. I also think our siblings trust our judgement enbough to know that we wouldn't steer their children wrong, and if their children were really in danger, we would tell them. Thjat is an imporatnt position oo. The upside to not having children is that we are pretty free to come and go as we please, which is nice, and there is a whole host of problems we will never have to deal with.
Ursula, the universe will unfold as it should, and while we don't always understand the reasons for things, there are reasons, and good ones. Keep in mind, I am at "this place" many years after I began infertility treatments. It is a process, going through it, dealing with it, and accepting the end result.
PM me if you'd like to discuss this more. Good luck and prayers for you!!!!