Pregnant or long cycles

Today is currently cd53, I'm usually 35. I am on clomid for 3 months now. Hubby and I started preseed from the beginning of June until now. We use it every single time sometimes every day to every other day.

I've taken many hpts from first response to clear blue to dollar store brands...bfn's on most of them. Got a faint line on clear blue and dollar store brand almost 2 weeks ago.

Retested after 3 days bfn. AF was due 1/8 ...Nada..had cramping spotting that turned from pink to brown and lasting 3 days only when I wipe.

I know you'll say go see a doc... Sure I will on Monday try to get an ultrasound. I'm just concerned as to what is going on with me. My first pregnancy was detected at 7 weeks....after which I lost it.

Has anyone had similar experiences and be pregnant? Is it possible to be pregnant and get bfn's?

I just need to know. Monday is days away and I just need something.