Depressed 😔

Ok so i have two kids. I’m vaccinated. My parents are vaccinated and one of my brothers is vaccinated but the other one isn’t. My mom doesn’t work but my dad works (pest control) and he goes into multiple peoples houses daily. He doesn’t wear a mask. But just because your vaccinated doesn’t mean you can’t spread the virus to someone who isn’t (like my kids). Well earlier today I got into an argument with my parents. I am exhausted. I have only slept for about 5 hours in all the past two nights because my 4 year old has been pretty sick with COVID symptoms for the past couple of days. I said that it’s probably my dad always coming in and out of the house after going back to work he’s probably brought the virus home to her. I know I shouldn’t be placing blame and that was wrong of me but it just makes me uncomfortable sometimes that they always call me paranoid and crazy because I’m cautious with my kids and don’t let them go many places or around my unvaccinated brother. Is my thoughts on this completely wrong?