On going weirdness!

Kyra
My bf and I have been trying for I'm going to say 3-4 months now. I started spotting last night it was basically dried brown cm. put a pad on before bed. I woke up this morning and I wasn't bleeding or anything. Went back in the bathroom later and wiped more brown cm. at this point I decided to us a tampon. Every time I go to the bathroom I change my tampon and there is only some brown cm and a little bit of pink blood. 
This normally doesn't happen when I start my period. It's usually heave like I mean have to change my pad in the middle of the night heavy for the first two nights. Then it gets lighter as the days go on. 
I'm not quite sure what's going on but I hope I find out soon.