Spotting

I don't know whats going on. I had a normal 4 day period 3/16-3/19. Then 5 days of brown spotting which is NOT normal for me. Then nothing. Then day before yesterday pink spotting, then yesterday light brown only when i whipped, then today dark brown and it's heaver. I don't get it. I've also had some period like cramping yesterday and Thursday when I was working out at the gym. None of this is normal for me, what gives? I was thinking maybe it's because I've been trying to work out more, I'm moving, maybe I'm stressed even though I don't feel it. I just don't get it! The only reason my brain is messed up is because I said something to my best friend of course she says if it were me I'd take a test but I don't wanna put that out there cause I want it to come true. That's a one in a million so thats crazy. But really what gives?!