Amy 
As you know, I actually have had a recurrence, so let me give a little "tough love" here.  The point of the surgery is that you have a 15 year old who does not want to lose his mother.  But don't think I do not hear you.  When my ENT told me about the surgery I needed and the consequences, the very first thing I asked was "and what happens if I don't get it?"  Her answer (which is probably not what a male doctor would have said) was
"In my opinion, you would be a foolish husband and father - but it is your choice"  Now I am over 2 decades older than you and if my tired old self is worth saving with surgery, then certainly a young woman like yourself deserves and needs every extra year that surgery can bring.  
This sucks big time and is very very unfair.  so I know that you are venting and that's okay.  Vent away here where you won't hurt or worry your family.  
You are entitled to a pity party and I know I wallowed in it after my recurrance.  Keep the faith Amy,  
Charm