Wondering if its possible to have a solid bfp at 10dpo

I wont post because of the rules but I am nervous. I have lost 2 in the last year at 5 weeks and yesterday got a very clear bfp. I have been cramping a lot today but just a dull sort of throbbing. Is it really possible to have a strong bfp so early? All of my others were never strong lines. Even with my son I didnt get a Bfp until about 5 1/2 weeks.