Weight/Health Problems = Stress

So I am 5'4" and currently weigh about 135 lbs. I have previously been around 124.

unfortunately I am undergoing a lot of health problems right now. I have just had two operations between the end of July and August. Unfortunately I have another one coming up later this month.

It is a big chance I have Chrons Disease and I may or may not have esophageal and colon cancer.

Anyways, I have family members and even my bf.. who keep making comments about me gaining weight....

It makes me super upset, because these medications and the stress from these operations are what is causing me to gain weight.

How do I handle this without complete stress overload?