Could I be Pregnant? PLEASE REPLY!

A few years back I was on the Depo Shot, which caused me to quit having periods... even after I got taken off of it... so last month, March 5th, to be exact.. I went to the Doctor to see what I could to about getting my periods back... the Doctor the prescribed me The Pill, which I started taking right away; I took it everyday, at the same time, like I was instructed... then by March 17th, I had my first period in Two Years... 

Okay now here's where it gets a little "tricky." My boyfriend and I have been "sexually active" for a while now, but w. no periods, we didn't worry about "getting pregnant" or wearing condoms, or being "safe" at all. We simply... do it "the old-fashioned-way" 

My period was 4 days long... two days after, me and my boyfriend were "back at it". I would say we've had quite a bit of sex since my last period... and he's "came" in me every time. 

Now, this was last month... and I have yet to get my period. 

BUT... I took 2 HPT's... and they both came back NEGATIVE. 

BUT (again) I have noticed a lot of change in my eating habits and my emotion behavior as well. 
I have been the most moody, emotional, cry-baby EVER! I have never been so RIDICULOUS in my entire life.  

My eating habits have changed completely, I almost have to force myself to eat. Even w. food that I actually ENJOY! It's awful. 

Maybe it's all in my head, or maybe I could be right? I don't know. 

I just need someone to help me out a little, lead me in the right direction w. all of this. 

(P.S. I have had a increase in my urination as well. My boyfriend even noticed)