I am three months post op and definitely went through that. One day almost a month after surgery I had a HUGE meltdown. I was sobbing and screaming and everything. Questioning why did I do this and the fear of my regret was huge!! I was questioning how I was going to live like this after all, I was just frustrated! Everything went uphill from there. IT WILL GET BETTER!!! Once you are on a steady diet of solid food, you will feel better too.
I didn't want my surgery too close to the holidays because I expected to feel like you do. Thanksgiving was 2 months out and Christmas was 3. I was able to eat, just very small amounts. I have found that having a "taste" of something is far better that not having it at all. I had a small teaspoon of mashed potatoes and stuffing. Didn't need any more than that, couldn't finish it all. I was a Coke drinker too, I tried a sip the other day, hated it! I was astonished at that. Always remember to eat your Protein first and you'll do great.
I'm down 60 pounds and 4 pant sizes in 3 months, I may not be losing it the fastest but I am so happy I did this!!! I hope that you find that you will be happy with your decision too!!! Does your doctor offer a support group? I havent' gone to mine, I haven't felt the need to but I am glad I have that option should I find that I need it down the road.
Good Luck!!!