This has been my problem for years! No period, constant periods, every other week, every other day. Doctor put me on birth control when I was sixteen...everything with my cycle seemed perfect except for depresion, weight gain and loss, etc. but then when I went of it had actually created worse problems because the progestins in the birht control are not what our body recognizes as the same hormones we produce. I am 25 and my husband and I are trying ot get pregnant and it has been difficult. Now for the first time in my life I am regular thanks to narural progesterone(meaning it hs the same molecualr structure the body makes). I am finally stopped bleeding after 1 and a half years straight! I ahve seen the first normal cycle.
Read the book what you doctor may not tell you about premenopause...it is a wealth of info regarding all related hormonal issues. My body has already started shedding extra weight and other things are changing.
Chances are when you got sick it through all functions in the body out of whack. If you took anything for the cold... Antibiotics cold med. atc. your body may have recognized them as xenoestrogens which mimick hormones and not letting the real hormones do what they need to do.