could I possibly be pregnant?

Denise
So I had light spotting, then had my period. 7 days later I'm spotting again. While ovulating. Iv been looking up things. It said to take a pregnancy test. I did and it was negative. My husband and I have been trying for 7 years. And just recently adopted. Little boy and girl. Ages 7 and 8. I am also having slight cramping while I'm ovulating. Could I be pregnant? Or am I over reacting.