Thanks for your query.
I read your query and I understand your concerns.
Following is my reply:
1) I dont think it has got to do anything with medicines.
2) It is common to have heavy flow or some other cycle variations some times. Hence I suggest you dont worry about it.
3) Dont take any medicine without consulting doctor
I hope I answered your query. I will be available for any follow up query you have.
Dr. Mahesh Koregol
IVF & Infertility