My 16 Yr Old Daughter Had A Laparoscopic Appendectomy A

My 16 yr old daughter had a laparoscopic appendectomy a day ago. Weve been discharged same day, within 24 hrs. Evrything seemed normal but when she peed this morning she notice blood. We thought at first, it was from urethral opening, but now we know its vaginal. She already had her period at the beginning of this month. Is this normal post op? Also, is redness around umbilical incision normal? Shes not feverish nor warm around the redness. I just noticed it, cause the other two incisions arent red. But there was bleeding on the umbilical one during our hosp stay. Just abt a couple of drops.