I want all of your oppinions. I had sex a day or two after i ended my period the beginning of the…

I want all of your oppinions. I had sex a day or two after i ended my period the beginning of the month and i bled just a little after, well last night my S/O was giving me a body massage, and when i rolled back to my back there was light blood on my bed and on my leg, it was just a little bit and i just went pee and there was some blood in the toilet and when i wiped there was like a dark blood or discharge or something. It's definitely nit my period so i dont have an explanation for this one. Im kind of cramping too, but it could just be gotta use the bathroom cramps since i can never go #2