do I need to go to a gastroenterologist? f15 (please help.]

Age: 15 ( 16 in a month )

Height: 4'9-4'10

Weight: underweight. ( not to a deadly point )

Sex: female

I don't smoke or drink

I'm white and British

I have no medical history.

I don't take meds or anything.

_________

My dad passed away in 2019 and I got online bullied since 2020-2021.

So during the time I was getting bullied on December 8th 2020. I suddenly got sick in my stomach. And ever since then it HASN'T gone away. I have a chronic sick sensation in my stomach and chest for 3-4 years. ( I don't have pain, or anything it's just a sick sensation. )

I've also experienced other symptoms but you can see my other posts for that,

since this post is about my chronic ( or long-term ) sick sensation in my stomach and chest.

But I also have growling and not much appetite with it. And I'm conspitated constantly.

And I feel extremely unwell daily. And I don't know if this is anxiety or something else.

Would it be a good idea to see a gastroenterologist for it? Or should I see a doctor or a psychiatrist first? Just incase if it's mental health or stress related?

Also could this symptom be from anxiety? Like can it cause this symptom? I never se anything about it. And I feel lonely and unwell with it.

Also what is my chances of it being serious? :(