“so I dont usually eat Shalosh Seudos (Dont tell me its a Mitzvah, Its no Mitzvah to get violently ill”
I’m not a Poseik, but that sounds reasonable to me. I think this would qualify as a case where you can be yotzei with Divrei Torah (b’dieved, one can be somech on Divrei Torah for Shalosh Seudos).
You really can’t eat anything at all for 4 or 5 hours? That must be so hard! In terms of Shalosh Seudos, is it possible to end the Day Seudah earlier, or is that impossible?
Or you can do what a friend of mine used to do in the winter – her husband went to Vasikin and then they had breakfast with Kiddush and Hamotzi, so lunch was technically Shalushudos. But I don’t know if Vasikin is an option for you. Even if not, is it possible for you to make kiddush and hamotzi when you come home from Shul, then bentch, and then go for a walk and come home and wash again?
I’m not trying to tell you what to do – maybe you thought of these options already. I was just thinking of ideas since you brought up the issue. But maybe none of these is a reasonable option for you.