Started pack (tricyclyn lo 21s) friday Feb 13

Pack finished thurs mar 5. Had unprotected sex on Fri mar 6. (Fiance and I have been together for 8 years, no kids). 

Expected period on Sunday mar 8/Monday mar 9. Didn't get it. Had cramping, extreme nausea and bloating (new for me). I took a prego test on Friday mar 13, it was negative..later that night I started my period (and my next pack).  

My period has never been late before, that freaked me out. I am on day 25 of my pack of pills. Haven't skipped any. I have been bleeding on and off this whole month. Stringy brown clot like blood. Really gross. I have cramps, bloating. I also feel weirs, not like myself. Im very tired, headachey. I'm freaking out that maybe I am pregnant. 

I am not sure if I should take a test now, or wait and see if I get my period this Sunday/Monday?

Thanks!