Subchorionic hemorrhage

Mariam • Mommy of 2 🤰🏻with 3rd

One weeks ago my doctor found some blood around my placenta measured 1.47cm then one week after two new found measured 1.8cm and 2.4 cm . My doctor said I’m slightly high risk .. I’m doing bed rest but scared. I’m 18 weeks with anterior placenta. I’m having no bleeding and spotting. But having alot of pain in my butt and back . Is anyone out there had subchorionic hemorrhage and end up had normal pregnancy ... please give me some mind ease.... thank you