Lots of DPO8-10 symptoms

Brittany
Ok so I'm anywhere between 8 and 10 days DPO. Clear blue said I ovulated two days sooner than my body felt like I did so... Anyways
Symptoms: 
Sooooo thirsty
Back pain/ache
Cramping just like a period but in the morning mostly and maybe just a few short 10-15 min times throughout the day 
A small dot of brownish blood on the tip of a tampon
So this afternoon I took a first response and a clearblue digital BFN
I'm determined that these symptoms are mor than period symptoms.
What do yall think?