Need answers plz

Okay so my SO & I had unprotected sex 2 weeks ago.. the day after I ovulated. My period will be late 3 days tomorrow and I have felt some slight cramps but nothing like when AF is coming.. I've had continuous watery discharge for the past 3 days now.. my boobs arnt really tender but they have their moments and sometimes I have some sharp pains in them. I've kept headaches.. I'm staying tired. My main concern is the discharge that constantly is sending me to the bathroom cause I'm thinking I start when it's only I have a lot of this discharge. Did anyone have this before getting their BFP?