13 days of spotting

Hello! This is my first post and hoping that this platform can help me.

My husband and I just TTC for the first time this month. Prior to this we were very careful.

I have been off the pill for over 2 years.

Anyway, we had sex 3 time before or at the time of ovulation.

Day 6 or 7 after I started to spot, brown at the wipe of toilet paper.

Well... It never stopped.

I had intermittent reddish/pink blood, but have hardly had anything stay on a panty liner. Also, some of the brown spotting has been fibrous or clotty.

I had very sore breasts, cramps and sore back during the time. (Typical PMS symptoms but breasts were much more sore than usual)

Also, as a side note, I took a test yesterday day 3 into my period and negative. Also, typically my periods are very very very heavy. So I think this is where some of my panic is coming from. I am quite regular the day I start my periods and they are heavy for a couple days..

Anyone else can shed some insight what's going on?

I appreciate the feedback, being new to this my mind has been going all over the place!