It takes 6-8 weeks for your body to recover from the gall bladder removal. And since you had lesions removed to, that may be part of your pain. I don't know how long it might take to heal up from that.
If you have diarrhea, ask your doctor for Welchol. If she hasn't heard about it, tell her to look in publications for GIs; it's an off-label use. A side affect of the medicine is that it absorbs bile. This constipates the people who have to take it for cholesterol reasons, but is an absolute God-send for people who have too much bile, which causes diarrhea.
Don't forget calcium to also help with the D and to help heal up any inflammation in your intestines from excess bile and the meds they put you on for surgery.
Did your doctor offer you any sort of acid blocker for your heartburn? Some people, like my mother, end up with GERD after their gall bladders come out because the excess bile washes back into the stomach instead of going down into the intestines. An acid reducer should help cut some of that. You can always try OTC stuff and see if that helps. Acid imbalances can often cause nausea, so taking an antacid might fix that problem as well. Be sure to avoid spicy, milk, citric, acidic, coffee and caffeine, until you get control of your heartburn and nausea, as those all cause more acid production.
If you start to get a little nauseated, actually try eating something mild. Before, and somewhat after my GB removal, I found that my hunger and fullness signals were all mixed up, and that sometimes instead of feeling hungry, I felt sick to my stomach. If I ate, I felt better.
I don't think there's anything wrong with you needing a little medicine to help your emotional state, but I would think it would be best to try and get your physical problems sorted out first. The more meds you start at once, the harder it is to figure out what's working, what's not and what's causing what side affect. But I see no reason why you can't and shouldn't start therapy at once. Even if, God forbid, you are fated to live the rest of your life with some sort of medical problem, you can't spend it in your house, never leaving. People everywhere have medical conditions and physical handicaps and they manage to do some things.
I read a really good thing in an old book on etiquette that really turned a light on for me--because I have always had some social phobia. "Ladies and Gentlemen do not assume that anyone speaking or laughing is speaking or laughing at them, because people don't speak or laugh about ladies and gentlemen." Basically, you must think of yourself as a lady. And you must assume that everyone else around you can see by your demeanor that you are a lady. And then you can be assured that no one will speak or laugh about you, because you don't invite any sort of scorn or ridicule. If any person is so common as to make a remark to you that is insulting or embarrassing, you either cooly ignore him or you give him a cool remark about having a "permanent, inoperable condition" and then you leave him to feel embarrassed at having teased a sick person.