health anxiety

hi all. about a year or so ago, a friend of mine shared their e cigarette with me, and I wasn’t aware that they frequently got cold sores & were on antivirals. Since then, any slight change in my body, especially my lips has sent me spiraling down an HSV rabbit hole and it’s really starting to take over my mind, literally driving me crazy. I’ve been over moisturizing my lips, I was tested (negative) at the doctor because I got a pimple right above my lips and had a mental breakdown about it. I guess my question is, what can I do to lift this weight from my mind? I hate living in this constant fear of any little mark on my face being from possible HSV😔