Just not feeling like "ME"- Could I be pregnant?!

[Jaime8679]

Hi Girls-

My DF and I aren't necessarily trying but we aren't doing anything to prevent pregnancy either. For the past few weeks I just don't feel like myself. My last "normal" period was December 12-17. We BD'd every day through January 5th. I don't track anything but use the "My Days" App on my phone. According to it I should have O'd anywhere from December 25-December 30. Below are my sypmtoms starting with 1 DPO (assuming I O'd on December 27).

1-5 DPO- EXTREMELY Tired and Bloated
6 DPO- Tired, Moody, cramps, and boobs hurt
7 DPO- Tired, Cramps and boobs hurt
8-11 DPO- Tired and cramps
12 DPO- Dark Brown Spotting
13 DPO- 2 days before my period was to start- Bleeding
14-15 DPO- Bleeding

My bleeding was lighter than usual and didn't experience any cramping. I quit bleeding on January 12- so techinically my period was only 2 1/2 days. Ever since then I am still so tired, my boobs hurt, and I just feel weird in my lower abdomen- like a pulling/stretching- very weird sensation. I have been having headaches off an on for the last week too- which are very annoying! I am not one to pee on a stick because I've only ever been pregnant once (May 2011) and that ended in M/C.

Can any of you offer advice? I know they say implantation can be light/short but 3 days? I don't know what to think- I just know I'm not feeling like myself.

TIA!!!