TMI (NO PIC) and sorry it's a long post

So I am having right now, well what I assume, is my period. Let me explain a little about my period. My period is always 3 days long heavy, medium, light, and then 2 days of spotting. My period has been this way for a long time and it's always been regular. Well this month my period has been strange. I started yesterday and it seemed to be a heavy flow, but I started to realize it wasn't a heavy flow. Maybe more of a medium flow. Okay that was a little odd to me. Also the stuff coming out was brown and a deep red sometimes. More brown on occasion. Well that night it was now more brown then red. I thought it was just a fluke till I woke up this morning and now it seems my period has disappeared some, except for some brown spotting. This is only the second day of my period, so idk what's going on and to top it off my bbt went back up. It had dropped to 97.5 the day before my period and then after it has been 98.2 and 98.3. It's really strange, because usually when it drops it stays down there. I have no idea what is going on, so any advice would me greatly appreciated!