5 weeks and can't cope

in 2016 I was pregnant and had sickness so bad that I couldn't cope. I literally couldn't handle pregnancy and had no help what so ever. I ended up having a termination. i found out before hand that the pregnancy wouldn't of lasted as baby's heart beat was so low. I'm now 5 weeks pregnant and thought I'd try again with the help of my doctor. I'm on numerous medications this time but today has been total hell. I just cannot cope to the point where I say I can't do this again and I become adamant that I want to terminate because I can't go on like this for another few days let alone weeks. The nausea and sickness and dizziness turns me into a complete mental person . I just don't know what to do. I Just wish my doctor could knock me out for the next 3 months!