TTC help!

Rayne 💙💜👼

Hey this is my first post and I need help! We have started trying for our third child, I sometimes have irregular periods, on this occasion I had my period on 29th may and was due the beginning of july, my periods are always 5 days regardless, then july came and I was late, i went over by 4 days then i had bleeding that was a lighter flow and it lasted only 2/3 days only, but I'm still cramping/aching a little in my tummy and my boobs are still tender sometimes have a shooting pain in them too, I'm tired all the time also, I've been taking tests and having negative results, when i checked on my chart we had sex right within the time i could have possibly ovulated but I'm losing my mind now, please help with any advice!