What's going on here...

So on the 27th of November I got my "AF" at least that's what I'm calling it, it came 8 days early and only lasted like a day and a half when I normally go for 4 days. They did preggo tests at the dr then but they were negative so about two or so weeks later I kept feeling these little cramps on the left side of my lower abdomen towards my uterus, which went away they weren't horrible but definitely strong enough for me to notice, now I'm always tired my breaststroke are tingly and I'm having a lot of watery CM and a tad of lower back pain I don't want to take a test just yet but I'm curious to know if I should consider this as a maybe pregnancy or if is should just disregard all together and not bother to get my hopes up, any opinions would be aprreciated.