spotting?

i got my period on the 17th of october i had unprotected sex on the 24th
of october and on the 26th of october i ovulated i had unprotected sex
on the 26th , 27th and the 28th , again on the 30th and the 3rd of
november i had unprotected sex again last night which was the 7th of
november i went to the toilet straight after and when i wipped there was
spots of blood on the tissue.i then wipped a few more times and there
were a few more spots of blood. later that night i had abit of brown
discharge and nothing since, im very bloated and my breasts are quiet
tender. i havnt been going to the toilet for a number 2 as much as i use
to . since wednesday the 24th of october i didnt go untill the 30th of
october i havnt been able to go . oh i also forgot , iv been having
frequent headaches during last week. and feeling tired no matter how
much sleep i get .im also getting slight cramps in my uterus. any ideas?