Living in Hell for two years

Hi. So I've posted on here way before, but still dealing with this issue. Since January of 2023, I have been getting INSANELY itchy bites for about a month in the Spring, and then maybe one bite in the fall, and then a month in the winter. Yes, with four months at a time of not being bit at all. I had hired an exterminator in June to come out, but then had canceled because the bites had stopped. I am currently dealing with getting bit (not every single day), but pretty consistently since December 18th. I wish I could post a photo of the bites on here, but it says it isn't allowed. They look identical to bed bug bites, but they're not all the time in a cluster. My old roommate was never bit, my ex was never bit, my current boyfriend has never been bit, and my downstairs neighbors (I live in a two-unit duplex) have never been bit. Yes, I understand not all people are affected. I have tore my room up multiple times throughout the years and have found nothing. I have encasements for both my mattress and boxsping. I have yet to tear my room up this time as of right now, but plan to immediately.

My question is, with it have been being this long, wouldn't I see something by now? I am literally going INSANE. This has been a two-year-too-long freaking battle and I'm mentally so burnt out. Wouldn't this infestation be insane by now? I'm seriously like 98% sure I have bed bugs, but WHERE. Someone PLEASE help me. I am at my wits end. It is 4:45am as I'm typing this and I am just so, so, so tired of mentally exhausting myself with this.

Please let me know if you relate or have any insight. 😩😭