Abnormal pregnancies?

Tasha
Okay-  so I've been having some weird symptoms. Tell me if I'm crazy or if there's any possibility in a BFP
​What I thought was my period had started 3 days early. And only lasted 3-4 days. Very abnormal period for me. Around that time frame, there was about 3-4 days where I was nauseous and just felt a little "off". 
​Also, I had felt like I had a uti all last week- where I took a few pregnancy tests, all which were negative. 
​I felt fine all weekend- then today it just hit me. Lower back ache, body aches, bloated (that can't "suck in" feeling), feel like my boobs are popping out of my shirt. 
​Anyone have an abnormal starts to their pregnancies? 
​Such as- not showing a BFP until later on in their pregnancy
​Help please. :-)