Help awnser plz

Well, just had my period on the mon-fri 18-22. 13 days ago I had my period,and ov in beg of month. Made love with my husband on Thursday,3 days ago. and then next day at 10 pm i saw a pink line. Happened lil through out the day pink spotting (day 11)

I'm kinda worried idk wtf cause my next period don't start till like the 20th. Then today I wiped and got a slight cramp made me have to go potty (sorry for tmi) I'm bout to ov but why am I having this u think happens on n off.