Constant Nausea and Difficulty Swallowing - Need Help!

Hi lovelies, can anyone help here, I am 22 years old and since last year June I have been experiencing constant nausea and difficulty swallowing. The start of 2022 January I got food poisoning twice, but the weird thing is the I got better until June when the nausea started and now I have it ever since. I have done a stool test for H pylori that came back negative I was still not sure so I had an endoscopy done boisy were taken for H pylori and celiac disease both came back negative the doctor said they were problem it was reassuring at the time but I am getting so frustrated and even suicidal I have emtophobia I hate being sick and I haven’t been sick yet just avoided it which is so hard. Some days I don’t have nausea if I’m lucky but most days I do. The only thing the doctor picked up for the endoscopy was very mild stomach inflammation but what doesn’t make sense is that was in august surely it would have cleared up now? And recently I have been getting quite worse I just want my old self back 🥹 I hope all of you here have good health being ill really does suck 😞 ps the doctors say it’s all in your head or it’s aniexty or ibs bullshit when I know my body it’s not!