Yesterday was last of my period , i took a bath and i was clean ,then i had a sex ,in the morning i saw a bright red blood on my pant, is it normal?

Possibly.: It is possible that the period was not finished and sex with contractions caused the uterine flow of your menses to come out. It is possible also that you are bleeding from you cervix which is not normal and some kind of inflammation bled. That could be infection or cervixal skin changes that are viral or precancer. You should see your gynecologist for a good examination,

Don'tPanic>ButSee Dr: In 50% of patients with Post Coital Bleeding NO CAUSE is found even after extensive studies. Some of these patients probably had instability of the uterine lining due to hormonal changes. In the other 50% the most common findings were cervicitis due to STD, cervical polyps, uterine polyps, uterine fibroids and endometriosis. Incidence of Cervical Premalignant/ vs cancer with PCB= 2-9%/ 3-4%