Good evening guys

my period ended last week Tuesday,it was a normal period. Tho I've bn taking some hormonal balance pills and today when I woke up to pee I noticed I was bleeding so I washed it off but before then I had sex with my husband immediately after my period. Few minutes later I dipped one of my fingers inside my p***y I discovered d blood was brown and has some discharge on it... please help me I'm confused. My lower tummy hurts me so bad. What is happening to me???