New wetness?!?

Maggie • Hello my name is Maggie! I am 17 and married to my wonderful husband who is 21! And we are currently NOT ttc! Buddies??
Okay so I just got off my period on Monday and started tri-sprintec BC and had unprotected sex mon,tues, and today..I have never been on this BC before so I was wondering if it protects you right away or if it takes a while but ever since tue, I have had a lot of egg white and watery discharge. Like it wakes me up in the middle of the night because I feel like I have peed on my self kind of wet. Could this be from the pill?..and before you ask no I do not have any STD's neither does my husband. Just need some honest help from people who have taken tri sprintec