2 weeks late/Day 48

I was suppose to start my period on Dec 2nd but didn't. Around one week late I took a pregnancy test which was negative. I just figured I'd surely start any day. I had been under extreme stress for a few weeks; so I just assumed the stress delayed my period and maybe even ovulation. I never "dried up" (sorry for the TMI!). As a matter of fact, I got what seemed to be ew cm on Dec 6th. Then on the 15th, the week I'd normally be ovulating, I felt like I was starting my period w/cramps and sore breasts, but it didn't start. Today I am so bloated, it looks like I'm about 4 months pregnant, it's crazy.

In the past I have been notorious for peeing on sticks ...I've probably wasted a thousand dollars on BFNs! So, this time I waited till I was a week late then forgot about it after I saw BFN. Now though, I'm not sure and think I should take another test. Wouldn't I have gotten a positive when I tested at one week late though? Sigh!

I've been using the winkpass period application on my ipad. I just looked through my menstrual cycle record for the last year and a half. My average cycle length is 31 days and the longest I've ever gone is 35 days one time a year ago. Before I used winkpass, I can't remember being late more than a few days, nothin extreme like this 48 days!

Oh, I'm also extremely tired and my bowel movements are totally messed up. I've been constipated off and on for about 2 weeks. So, now for the age old question, could I be pregnant!?