You may have been eating too much protein, as that can have a significant impact on blood sugars. Ask me how I know... breaking a fast, I ate a can of tuna with (added by me) a really good quality olive oil. My BG shot up three points! I tried it again during a non fasting day, and got the same result. I then looked up the Insulin Index, mentioned in a book I was reading, which shows a value for the insulin response to certain foods. Tuna was very high.
In Keto Clarity, Jimmy Moore also says that protein should be limited in order to get into ketosis, and having too much for your personal tolerance level can make you a glucose burner rather than a fat burner - in other words, spoils the work you're doing with low carbing.
With your cultural heritage in mind, it could be that you have a low tolerance level and the amount of protein you were having was too much for you to benefit from low carb. The answer, he says, is to raise fat to a higher percentage of your diet than protein, which depending on your tolerance could be as much as 80%.
That will be difficult on a vegetarian diet, but not impossible - low carb could be difficult too. However, you are looking to get into a happy place with both diet and health, which includes mental health, so you are right to give something else a try.
Do you take multivitamins and minerals? With your health issues you may find that of great benefit. It takes a while, a couple of months perhaps, but if there is a deficiency you will notice a difference. I had very deep horizontal ridges in my thumbnails, which GPs generally found interesting but unimportant. When I began fasting for longer than 24 hours, I started taking a multivit with minerals every day. The ridges disappeared! I have no idea why, but I can only put it down to the multivit and minerals, as they have not reappeared since I lapsed in the summer and my diet has been erratic since then.
Good luck to you!