scared that I might. be pregnant and don't know what to do

So my bf and I have going at it pretty hard these last few days and have been going raw.  It's amazing I took the morning after pill but I know it doesn't always work and I am scared.  He has been talking about getting me pregnant but we aren't ready for a baby. I just turned 20 two weeks ago and he is turning 24 next month. Now I have to wait until next week to find out if I am pregnant or not. It's not that I don't want a baby but I have scoliosis, fibromyalgia and high blood pressure so both my life and the baby life would be at risk. I don't know what to do and if I am pregnant abortion isn't an option and he knows that. 
I need some serious advice about my situation and guidance.