am I crazy or what?!?!

Desiree
Past couple days I haven't been feeling like myself... lower back pain like crazy, mild pelvic pain, shortness of breath and not to mention it felt like my stomach was growing. I already have one kid shes 6 and it kinda felt like it did when I was pregnant with her.  Usually when My body is telling me I'm about to start my period soon it comes with really painful cramps and bloating like 2-3 days before, so now I'm 3 days away from my ACTUAL period and I'm having mild cramping I took 2 pregnancy test and both were negative... what do you guys think? Is there a possibility that I could actually be pregnant or is it all just in my head???