I had been on the pill for nine years, and then I went off. I had horrible, heavy, crampy periods for a year. They came about every three weeks. So, I eventually went back on the pill. I also gained weight. A lot of weight. I never gained when I went on the pill, but I did gain when I went off.
As the others said, everyone is different. Some do get pregnant right away and some take a year or more. Some women's cycles to not even out for a long time, if ever. I never had a normal period before I went on the pill, so that is why I went on it in the first place, but it did get a lot worse when I quit taking it. So I am back on it now, and quite content again. Of course, I am not trying to conceive. Just relax and it will happen in time.
As for the vaccination thing, I am really sorry about your nephew. Vaccines do have possible side effects (some very severe)but so does everything that you take or do. I will vaccinate my children. And I don't think that my children should be in school with children who are not vaccinated as it is not safe or fair for that matter. But, that is just my opinion. I would rather have my children vaccinated so that they do not catch the measels, mumps, or anything else and have it kill them. Especially when I could have prevented it very easily! But, at the same time there is that slight, slight chance that something horrible could happen and I do understand where you are coming from.