Have you spoken to the consultant at the hospital who deals with high risk pregnancy (im assuming that you would be classed as high risk due to the gastro? Correct if I'm wrong!

You've got a better chance with an OB or consultant who has previously looked after you. No one else will touch you generally if you are under 30.

After our next one we will be having my tubes tied. It's risky for me also, for different reasons! (my body and pregnancy don't get along! Nearly killed us both last time!)

Drs will try and force the Mirena on you first or depo provera or any other contraceptive. It's a big decision to make. And if you want it done I hope you can find someone willing to do it. Good luck.