Midcycle brown discharge?!?!

Okay ladies, I stopped my cycle about a 9 days ago started prevera today yesterday and today I have brown old blood sdischarge... a few nights ago hubby and I had some fun... used a binraror on me and went in kinda deep and it hurt he did this twice before I finally said ouch... he noticed he had some blood on his hand from this... didn't have any discharge after this happend until yes and today... were ttc baby#4, I don't know if this could be injury from the other night or just mid cycle spotting ... last 3 months I've been on prevera and haven't noticed it... I'm just co fused and no positive ovulation tests yet...