Random spotting ?? TMI** PLEASE HELP!

I went off the pill last month and already had my withdrawal bleeding February 18th to the 22nd. Im pretty sure it was the 27th I had unprotected sex and he didn't pull out.. yesterday, I had a very little bit of brown spotting that turn to discharge today..and I'm really confused because it's only cycle day 18. I have no idea when I will be getting my period.. I don't feel like I'm going to have my period, just faint little twingy pains but that's about it.

Tmi but this is what it's like today.

Please help!!

XO