i went to the bathroom two days ago after i had slight cramping and i saw a little bit of blood on the toilet paper. about two hours later, i had to go again and i noticed there was no blood and the cramping had stopped after a few minutes from the first time i went to the bathroom. Since then i have been feeling sick, but not vomitting, and some frequent urination. I've also had slight abdominal cramping like i'm going to get my period, but i won't until the 10th. i've also had constipation, it went from like saturday to today. could it be possible?

and also they say nipples get darker, can anypther types of skin get darker like maybe inner vaginal lips that are slightly longer then they should be?