Miscarriage?? Help

So I hadn't had my period since January (we're halfway through March now). I took a few tests which came back negative and one was a possible positive.  Well tonight I began bleeding so naturally I assumed my period started and inserted a tampon. The more I thought about it then I realized that I never had any of the signs of my period coming (bloating, acne, cramps).  I showered an notice the blood was darker than normally and kinda broken apart versus natural blood (sorry for the TMI).  I'm just now cramping but Again, I usually cramp days leading up to it. Idk, maybe I'm thinking too much into it.