u/Connect-Ad-7091

Hi everyone. I posted a couple of weeks ago about a bed bug I found, thank you to everyone who helped identify it (even though I really wanted to be wrong haha). I washed literally everything, bagged things I couldn’t, got interceptors for my bed, and my apartment was treated two weeks ago. I hadn’t seen any signs of them since (actually never saw any signs beyond the initial 1 bug), however yesterday and today I’ve had a rash/cluster of welts develop on my arm which just became itchy. At first I didn’t think anything of it (I work with salt water and stinging anemones at work so my arms tend to get irritated), but now I’ve made the connection to bed bugs and I’m really scared. Did they come back? Did they never leave? I don’t know what I’m supposed to do.