Welcome to OCF! You have been thru alot and it will take a long time to fully recover. If you were only recovering from OC, I would say it can take a full 2 years.
As far as your weight goes, it is very common to lose significant amounts of weight. I lost 65 pounds myself and have gained very little back even 6+ years later. In order to recover your intake needs to remain hi. Every day you need a minimum of 2500 calories and 48 oz of water. If you still continue to lose weight with this intake bump it up to a minimum of 3500 calories daily. I know its alot but in order to heal after what your body has been thru it requires higher calories. Check with your doc and see if its ok to add some high protein whey powder to help speed your healing. Without pushing yourself to take in at least 2500 (or 3500) calories and 48 oz or more of water every single day your recover will take much longer and be a more difficult path. Nutrition and hydration together are the most important part of this battle.
If eating is difficult drink the Boost very high calorie drink which has 560 calories per drink box. This can help you to easily hit your minimum calories. here is a list of easy to eat foods too. If you choke on the grapes you are eating, cut them in half so they dont become stuck and create a life threatening situation. Its very easy for OC patients to choke easily during recovering and relearning how to eat.
(All measurements are estimates)
Giant High Calorie Choc-Peanut Butter Milkshake3 or 4 cups chocolate ice cream (regular/full fat type)
2 tablespoons peanut butter (smooth type)
2 tablespoons chocolate syrup
1 or 2 cups whole milk (can substitute half and half to add even more calories)
1 scoop carnation instant breakfast
1 scoop high protein whey powder
Blend this extra long to make it very smooth and creamy so it goes down easier. Each shake is about 2000 calories.
Easy to Eat Food List 
