Paranoid about bugs lately, is a bed bug proof mattress cover really reliable

Lately I’ve been getting super paranoid about bed bugs and it’s honestly messing with my sleep. Every little itch or tiny spot on the sheets got me checking my mattress at 3am like crazy lol. I’m thinking about getting one of those bed bug proof mattress covers but I can’t tell if they actually work or if it’s just marketing.

I really don’t wanna waste money on some cheap cover that rips fast or still lets stuff get through. I’ve read mixed reviews and now I’m stuck overthinking every brand. I just want something reliable that fully seals the mattress and actually lasts more than a couple months.

Anyone here dealt with bed bugs before and used one of these covers long term? Did it actually help give peace of mind or stop the problem? Would really appreciate real experiences and brand suggestions from people who’ve actually tested them.