I’m sorry to read about your condition. 
I really can’t imagine what you’re going through because you’re desperate to do something that you know may create serious complications for your child. You have gone through so much pain for a long time, just be patient for 4 more weeks and InshAllah you’ll be glad that you waited. I think you need a lot of emotional support. Have your loved ones around you so you don’t feel as much pain. You should trust what your doctor told you because s/he knows your medical situation better than yourself. Like Niksik said, you’ll forget about this period after you see your baby. InshAllah!! hug