So my doctor wants to see me in a few months...

I’m only 31... I had a healthy pregnancy and conceived quickly at 28... but now we are somewhat struggling to conceive our 2nd... so in three months, if we haven’t conceived, I’m due to see my obgyn. Why do you think they may have me come in? My hubby was very ill for two years - severe ulcerative colitis and now has an ileostomy (his colon is removed)... he’s doing so well- actually better than ever. His hair grew back and he put on fifty pounds (he was down to 130...) he’s doing amazing so I’m just concerned what this could be about... any help would be greatly appreciated!!