Any advice???

So I have posted before. Sept 22 I started my period and it ended the 26th. I had sex with my husband that night and the next day. Monday, the 28th I started getting little cramps and back aches, but they came and go. According to glow I didn't start ovulating till yesterday but I STILL get cramps and back aches and it's been almost 2 weeks since they started. But on Sunday Oct 3rd, that morning when I went to the bathroom, there was light bleeding, but I haven't had any blood since. I've been pretty emotional lately and have been cramping quite a bit. Also been super constipated and get random short head aches and only my left boob is tender...? Is there a possibility that I could be pregnant? I've never cramped with back pain like this for this long..