Hi! This is my first post :) Going through some med changes and I was wondering if anybody has had a similar experience and could give me some advice. Questions are at the bottom, here is some backstory:

I have been taking lamictal for a couple years now. When I started taking it I would get the worst nausea... I was in bed for weeks, I couldn't drive for months or eat, but I stuck with it because my psychiatrist at the time said it was either that or lithium and lithium is not really an option for me because of other health issues. 

Eventually the nausea went away, and then I was fine taking lamictal. In the past year my new psychiatrist added latuda and when I had a depressive episode in the fall he added brintellix. So I was taking all those (150mg lamictal, 10mg brintellix, 40mg latuda) for a couple months in the fall. The thing is I have some digestive issues, and then I had to take antibiotics because of strep, I got surgery, and then I had covid, all in 2 months. All those things fucked with my stomach a lot and then lamictal started giving me nausea again. Really bad nausea. I had to sit and stare at a wall until it passed because it was too bad for me to even lie down, much less use any screen or walk. So for a month and a half my doctor and I adjusted by reducing lamictal, splitting it into smaller doses to take throughout the day as opposed to taking it all in one go, trying anti nausea medicines and natural remedies but I didn't see much improvement. I was down to 5mg brintellix, 25mg lamictal, and 20mg latuda and I was still feeling pretty terrible so a couple weeks ago I stopped the lamictal altogether, and I stopped the brintellix as well (figured it made sense to stop the upper if I was gonna remove the downer) and the nausea is gone, and I feel better than I have in ages. I have been more productive, more engaged, it is easier to concentrate, I don't feel the lamictal fog anymore. I saw my psychiatrist and therpatist today and told them I had stopped the lamictal and brintellix and they were both fine with it. My psychiatrist says this is the best I've looked since I've been in his care (a year and a half) and he says the lamictal might have been fogging me so much that I couldn't do stuff, and since I couldn't do stuff I got super depressed. But now I feel great! And I'm not showing symptoms of hypomania at all (i'm sleeping enough, no reckless behaviour or spending, in fact I am being more responsible and kinder to my body than I have in aaaaages) but I am still scared of going off lamictal. I went off it once and I didn't have a full blown episode but I was irritable, my brain was going super fast, and I noises and light were incredibly annoying. I developed hypersensitivity to sounds and I felt like I had spidey senses. I could hear bubbles popping inside soda cans when I would drink soda while working, and it was so distracting I couldn't get anything done. The noise of technology also bothered me a lot (the buzzing coming from hard drives and computers, which apparently most people can't hear or have learned to tune out). I can feel the noises slowly creeping in again and it's kind of scary because they can be very overwhelming. Light has also been bothering me a LOT more recently. 

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SO I guess I have a couple questions, which are:

1. Have any of you ever gone off lamictal successfully? I thought I was gonna be on it for the rest of my life. I asked my doctor if I should take something new instead and he said to just wait and see what happens if I stay with only latuda. 
2. Have any of you had bad nausea from taking lamictal? Did it go away and then return? Did it go away the second time? Do you have any tips for dealing with nausea? I have tried all the remedies I have found online but maybe you know of something I haven't tried. 
3. How do you deal with overstimulation? Specifically from sounds. It's so stressful to hear EVERYTHING. 

Thank you for taking the time to read :) Have a lovely day.