Chocolate is the answer :-)! It has been about 3/4 weeks that you are under medication, by now you should feel a bit more upbeat. I'm glad that you are seeing your doctor; as I'm sorry to say that, but what you got given is s#!t!
You are such a brave man and I admire how you have coped with your illness. Eating is still a problem with me as I have lost appetite for food! On one hand I feel like I look better (was always very slim), but on the other hand I noticed that soon I'll look like an anorexic person. I have now 5 little meals throught the day, and it helps me to keep my weight stable.
Don't take this the wrong way but maybe going out with other women could be a good thing. It doesn't mean that you are back on the dating scene but more that you want to meet new people, try new restaurants, developing companionship without any ideas other than becoming friends with new people! It's GAL to broaden our horizons, not to jump straight away into another relationship.
I do believe that once your medication is sorted out, the real Shotgun will come alive again :-). What is your favourite food? If it makes you happy eat some more. Think about a memory that brings a smile on your face ( not one with your S) and think about it over and over, it will help you!
Where do I get my strength, I don't think I have any but I try to find something positive everyday. Example: British weather at its best, rain all day, so when I woke up I decided to wear a bright orange top! It did the trick I felt happy, got comments on the fact the colour suited me but most important was that when colleagues were interacting with me they were smiling because they felt happy to see such a bright colour amongst everyone else dressed in black! No chance to lose me in the corridors :-)! Seen people smiling really made my day!
I know you can get through this, and it's very good that even if you are feeling down, you still express your feelings to avoid to bottle them up.