>>> I don't go outside because I'm alone like ...
There are some podcasts and books on how to interact with people... something such as "how to talk to anyone". It may increase your confidence in starting conversations
You can try other options too
Hey Leaa! I come from a culture where they do tons of bloodwork. My first advice to you is that there's not an issue there yet. It's ok to feel scared and overwhelmed. They are investigating and there's a chance it isn't anything to be concerned with
Second. My father is a neck surgeon and all my family on both side have lots of thyroid abnormalities... trust me, most of them just follow up with blood work, ultrasound and sometimes medication.
Stay strong and don't think too much about ❤️❤️