Many many things can make it difficult to get pregnant, the only way to know for certain is to get checked out by a gyn.
Hello,
It can be due to menometrorrhagia. Prolonged and abnormally heavy menstrual bleeding is called menorrhagia. This condition is called menorrhagia. Normally the period stays for 3-7 days and comes in 21 to 35 days. However sometimes normal periods can be irregular. The causes of menorrhagia could be due to bleeding disorders, vitamin K deficiency, excess usage of aspirin, hormonal imbalance, stress, fibroids, recent intra uterine devices (like copper-T)etc. So I will like to advi9se for internal examination with gynecologist and take opinion.
I hope it helps. It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.