New Anxiety Diagnosis

Hey guys I have been struggling with anxiety/anxiety related symptoms for the past month and a half now. This has quite literally been the worst time period of my life. Not a day goes by where I don’t feel some sort of symptom muscle spasms, eye twitch, headaches, constant fatigue and brain fog, trouble sleeping, random pains, and elevated heartbeat awareness just to name a few. These symptoms usually lead me down an unstoppable path of intrusive thoughts and researching symptoms then jumping to worst case scenarios then wanting to go back to the doctor for more tests etc. even though I have been to 3 doctors who have told me I’m fine (besides the anxiety) and all labs came back normal. I am constantly looking for reassurance and when I get it I’m still not satisfied. This feels like an endless loop that has started to take over my daily life. I’m less social and don’t really feel motivated to do anything anymore. I have been prescribed lexapro 10mg but have held off from taking it as I wanted to try a natural approach first but it’s gotten so bad I am strongly considering taking it. I started therapy last week and have tried to incorporate things like magnesium and daily walks into my life. Just for context I am a freshman in college and went a little crazy my first semester with the partying. This started about a week after I quit smoking weed after smoking daily for about 6 months. Since getting the diagnosis I have quit nicotine about 3 weeks ago (per doctor’s orders after having an appendectomy surgery which didn’t help the anxiety at all) and cut back significantly on the alcohol. Any tips or recommendations will help I’m scared I’ll be stuck like this forever