Why has my AF been brown spotting for the last 3 cycles?? (TMI content)

Arghhhhh, my AF Is killing me, and not in the usual way. For the last 3 cycles, AF has been brown spotting, and just so different from what it has ever been before. Sorry for the TMI factor, but here's a quick rundown of the last 3 AF's:

Dec. 3 - Some light brown cm when I wiped. Put in a tampon. Change tampon 4 hours later, and there was only brown blood on the tip of the tampon. Had some cramps a few days later similar to AF, but no more bleeding whatsoever.

Dec. 29 - completely unexpected brown cm on toilet paper. No cramps. Spotted brown for 9 days :o Went from light brown cm, to brown blood, a tinge of red n one day, to black :o

Jan 29 - Had a bit of rough DTD :lol: Went to the loo after, red cm on toilet paper. Thought, whoops, maybe we were a bit too rough. Spotted watery red blood all day, but only enough that I'd see it when I wiped. Yesterday, brown spotting, only covered half a tampon. Today, brown spotting.

I know I should go to the doctor, but we've just moved and I don't really want my first doc visit with a new doctor to be, 'can you take a look up my hoo-ha?' does anyone know why this might be happening?