Has switching to a healthier diet helped anyone’s anxiety symptoms?

For the past three years I've smoked marijuana nearly everyday. It helped with my anxiety and quieting my brain and helped me sleep. Recently, it began to make me feel more anxious, i would wake up nauseous and even threw up a couple of times which really triggered some health anxiety. I decided to quit because of this and i'm almost 2 weeks out from the last time I smoked. My body is slowly recovering but my brain just doesn't seem to quit it. I went to my GP a couple of weeks ago for a routine checkup and everything came back normal in my blood work and exam, yet that hasn't stopped me from completely obsessing over my health and feeling like (in my mind, not my body) i'm seriously ill- which is giving me extreme anxiety. Because of my reoccurring stomach issues my GP referred me to a GI who I had an appointment with yesterday. He was very unimpressed by everything I said and seemed like everything is pointing to IBS-which is not serious and something my mother also deals with. He ordered some extra tests to make sure I wasn't dealing with inflammation and he said he was very confident that my internal vital organs were a completely fine. I'm still waiting on those test results and his confidence should I have made me feel better but i'm still freaking out. Everybody in my life is tired of hearing about it and I just don't know what to do anymore. I feel like i'm pushing people away. I feel good and like myself when I'm distracted and doing something fun, but mornings and nights and when i'm doing something mundane it's the worst. I feel like I can feel all of these pains and sensations but I have no idea if it's real. I've even started asking Chatgpt for constant reassurance and constantly googling my symptoms. I'm in a horrible loop. I should mention that on top of quitting weed, I also just graduated college, moved back home and my boyfriend and I started the longest period of long distance we've ever had to do so i'm just not feeling like myself at all. My psychiatrist just put me on Zoloft (my vomiting and intense anxiety coincided with when i began taking Prozac again so she wanted me to try something else) I'm only on day 3 of the meds but nausea and insomnia are the two side effects im dealing with right now which is just making my anxiety so much worse before the meds have even kicked in. Does anyone have advice on how to break this cycle of constant checking-i feel like taking a deep breath has even turned into a compulsion.

So, I weight 67kg and I am trying to lose weight, but I can't do a diet cuz If I go too long without eating I almost pass out of anxiety, I have a traumatic response due to not eating and then staying in bed and having to do treatments to be able to eat again. I eat a lot of rice and nowdays I am eating much less, cuz before I used to eat ALL the time, and I mean it. I am having problems leaving my house due to my anxiety and I am only able to go out for small walks or a grocery store nearby, months ago I was still in this state, but I was able to really go out, now I can't, cuz at some point I start to automatically have anxious responses and I feel bad. That being said, I am dealing with physical limitations, I can't exercise for more than 10 minutes, and can't go to a gym. I am trying to eat less, and less but I am losing hope that I will never get better and will turn into a fat slob. How can I improve?

Like to the point of your mind being yours? And not being anxious or harassed by your thoughts 24/7? I just wanna know if escape is possible?