FREAKING OUT!!!

Danielle • I`m a 38 year old mommy of 3 beautiful daughters 19, 15 ,3 and 1 sweet little boy who is 1.5. Married for 5 years and pregnant baby #5.
This morning when I peed there was some blood in my discharge when I wiped. Also i had a few sharp pains down in my pelvic.13 weeks 4 days pregnant. I have a fetal heart doppler at home and I did find the babies heartbeat. Should I be worried? Does anyone know why this happens if it's not a MC? Could it be remnants of my mucus plug developing? Please if anyone has any ideas...