I know how you feel, op. When I was younger I had tachycardia because I was too anxious, but after take out stimulant food from my diet like caffeine everything started be better. Begin an incel will surely physically hurt you, I know it every well because I had some mental breakdowns last ten years, I even almost got arrested because people thought I was planning go full ER inside the college campus.
I'm a lot stronger than when I was younger, but some stuff hurt me as much hurt younger incels because I'm human and weak. The lesson I had to learn to not feel bad all that time is that no matter what I do I will never be a normalfag, never accept their society and will live a life of seclusion as single man.