Bleeding and sex

Dont really know how to word this or start it so just going to go straight out.

Me and my partner dont have sex while im on my period, however the day after i finish we do, i usually bleed a little bit after but nothing worrying and it doesnt happen again until next period. However this month the day after i finished we missed, the 2nd and 3rd day i have bled a little.

Not sure if i should be worried or not as we are TTC and i dont want to feel like im a failure of a woman if i cant conceive or have problems..

TIA