First I just wanna clear up that I dont mean to offend anyone or claim that I have it even when I’m not educated or know alot about it

So I have been dealing with some sort of feeling..I’m not sure if it’s anxiety.. I’ve been feeling like everything is about me. When I go to public places I feel like everyone is staring at me and I began to feel sick to my stomach and my throat has a lump that just doesn’t go away until we go home. I’ve had a change in appetite and in my health but its not drastic changes. I overthink things too much to the point where I don’t even know who I am? Please tell me and give me advice on what it could be or is anyone going theough this also?