High Risk (TW suicide)

Today I found out I am 7 weeks pregnant. I am 20 and use contraception so it is a big shock for me. I'm high risk due to the fact I took a large overdose in an attempt on my life 3 weeks ago (so 4 weeks pregnant). My doctor today said that I may miscarry, but basically just to wait until 12 week scan. Im absolutely terrified something will be wrong. I've had really bad morning sickness for 2 weeks (which prompted the pregnancy test!) which is apparently a good sign. But I'm now stressing that I have to wait 5 weeks to see if my baby is okay.