An Unusual Situation? Help!

I don't usually post stuff like this but...I'll just get to the point and try not to be confusing. I really appreciate all answers and any help :)
November 11-14 normal period
November 21 had sex while on birth control and used a condom
December 8-11 normal period
December 19-25 much higher than normal stress
December 26-30 light spotting
December 31-to date January 22 high anxiety, much higher than normal
January 1 was scheduled to start and missed period
January 3 I had to start 3 antibiotics for staph infection (using a public restroom)
January 8-to date (January 22)
very sore breasts (not any bigger)
Cramping 
Whitish bumps around the areola 
A little white discharge
Very tired 
I also have hypothyroidism and from January 1st to January 18th I didn't take my thyroid medicine. Lame excuse, but I had a flood of sewage water in my home on December 31and the house was a mess. I ended up losing them until the new carpet was put in and everything moved back into the rooms. ANYWAY...I'm questioning if I'm pregnant or if it is stress. I am still very stressed about certain life situations but this has me most concerned of all.