Scared momma In need of advice..

So with this virus going around, I’m absolutely terrified all the time. I really haven’t visited any family.. I’ve only visited my mom and that’s after we’ve quarantined for at least 2 weeks and she doesn’t work or go absolutely anywhere. Well my fiancé’s mother wants us to come over for dinner tomorrow bc it’s my fiancé’s birthday. They’re not near as crazy as we are. They still see outside people and have been visiting family regularly. I’m scared shitless. I have a pretty bad immune system... like really bad. And I know I need to buck up and try to live life and whatnot but I can’t. I have extreme anxiety. And I take every single precaution necessary... I just just don’t want to get my lil baby sick. That’s my biggest fear tbh.

Any advice to calm my nerves?