Idk what is this. Reason of what i feel?

So, I went to a doctor and he told me that it is gastritis, which is some due to eating too much spices. And I agree with that. But I still have two questions : If it is due to spicy still there is a moment when I felt like heaviness in my cheat, unable to breathe, feeling smthn and getting nervous and thinking what it is even when i didn't eat anything spicy. Second it even happend when I was watchin a show and some scene made me nervous and I started feeling it again, but I wanna ask, since I study in a college where I don't need to go regularly, so I sleep around 6 am in the morning and wake up around 4 pm (also coz I have been depressed 2 years ago), and then when I wake up I have my lunch and have dinner around 12 am or smthn. I just wanna know since my family hates this schedule of mine, but I am like this only and I feel comfortable too (GEN Z LIFESTYLE yk) do you think this schedule is not okay? and it could be a reason of what I feel? or what.