Pregnant?

Kyiah • Nursing student, working as a CNA. #Single
Long post **
My last period was the 9th-13th
My periods have always been super regular.
My period was suppose to be the 25th-29th.
The 27th and 28th of November I only had a little bit of brown discharge.
I've been really dizzy and nauseous.
My boobs were really sore.
I keep having stabbing pains and pressure in my belly/pelvic area.
I've been peeing ALOT.
I've had cramps which I usually don't have even before or on my period normally. 
I've been really hot, like I only wear a tshirt outside when it's snowing.
I've been crying over EVERYTHING and I'm not an emotional person.
Everyone keeps telling me I "look pregnant"
My boy friend and I only had unprotected sex once. I've been on birth control for about 5 months but I was recently put on an antibiotic. I forgot to take a few of my pills. What are the chances that I'm really pregnant? I tested last week and they were both negative. I don't know how to tell what my dpo would be because of the birth control. What should I do?

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