Periods came 1week early. i spotted for 1day, bled heavy for 1day, then spotted again. now nothing but cramps?

Kinda the same thing is happening to me except I just had what I thought was my period on the 10th of feb then I started cramping and spotting on the 26th and it is now the 28th. It was spotting one day then the next When I went to the bathroom and wiped a couple times it was a bit heavier and now today its back to plain spotting. I tested last month because this happened then as well I spotted for a couple days then tested and came out neg. then a week later got my period. I don't what is going on