Missed it!

So last Wednesday I forgot to take my pill, and I ended up having unprotected sex with my boyfriend Thursday morning. I took BOTH Wednesday and Thursday's pill literally right after we got done because I realized I forgot. Now, a week later, I'm on the period row of pills. Today is day 4 and my period still hasn't come on. Please help. I'm stressing.  
BTW I take Tri-Sprintec, & ive heard it's a "combo" pill?