Large blood clots during periods without abdominal pain

Having heavy period with large blood clots that lasts for 2 days and third day is minimal,periods stop on the fourth day. The cycle is regular btw 29-31 days. Trying to conceive for over 1 year now after 2 kids with caeseran section. Please help. I was prescibe Clomid 50mg which I took and period became normal but started on the month clomid wasn’t taken. Same with Fluconazole…pls I did scan and am very OK, No fibroid, no growth of infection, what could be the prob