anxiety and health anxiety.

hey yall, so I’m assuming none of yall are doctors in here but I want some reassurance cause I feel like I have health anxiety/anxiety but I don’t know the full definition of it. basically I’m pretty much afraid half the time of everything. Meaning getting sick or getting a diagnosis or a disease etc. which is common for anyone tbh, but I also overthink alot like if I have a headache I jump to the worst conclusion, or if I see a TikTok about like a ‘study’s show __’ then I think about it for the rest of the day. Or I will be so afraid of getting sick that my brain starts trying to convince myself that I am. If that makes sense? Let me give u an example, yesterday I saw a vid that was from the news that said ‘study’s show that taking melatonin every night can cause heart issues’ and I take melatonin every night so now that’s all I’ve thought about. ‘What if I get this’ ‘what if this happens’ ‘what if I have something and I had no idea about it?’ . There’s always a thought in my brain. If it’s not one thing it’s another!!! Or if I have something that I’m looking forward to my brain try’s to ruin it for me by telling me something is going to happen? Hopefully yall get what I’m putting down.