10dpo brown spotting, bfn

Chapin • Married 9/27/14 , open to God`s will for our family :)
I am 10dpo and I had a tiny bit of brown spotting yesterday , cramps here and there and then today I had a tiny bit more , it's light brown , I had one cramp today that felt like in the middle of my uterus, and then it went away. I just wore a panty liner and that was enough all day, took a test tonight and it was negative. Has anyone experienced this ?