Might be a dumb question to ask but will a 4 day period affect fertility?

My period is usually 4 days the most normally, it's sometimes irregular. Will this affect my fertility and chances of getting pregnant. There has not been one person in my family that was unable to not have kids. I've been having unprotected sex for atleast 4 yrs with my partner. We are now in the process of rly trying to conceive for the past 4 months, I am curious if I cld have a baby at all, even though he's never came in me in the past until now. Is this normal??