TMI post... TTC baby #2, maybe it's our month!

It's cycle day 12, this morning when I wiped I had light pink/mucus on the toilet paper. Just only happened in the morning, no new spotting or prefuse bleeding like a period starting  early. Days before maybe 5 I had pinching pain in my ovary/uterus just once then nothing all day. Saturday 2 dats prior to, today I had light menstraul cramping.. I thought I was starting and got disappointing, and nothing happened! My BBs are tender to the touch, my joints ache esp. My back and I've come down with a cold. What do you think my symptoms are sounding like?