Coping skills, relaxation techniques, excercise, supplements for anxiety?

I am in mid 40s. I have experienced anxiety 4 times in my life that was long term 1) when I was a teenager our car was hit by a bus, I did not want to ride/like riding in vehicles for a couple of months(just got over it) 2) choked when I was a teenager-worried excessively about choking for about 6 months went to a counselor but it just went away
3) mid 30s kept feeling like something was stuck in my throat after going to several specialists they convinced me it was anxiety so I took the meds/counselor nothing helped until they did a ph test revealing I needed stomach surgery went off meds and did not look back for 8 years 4) Recently I felt anxious/depressed and tightness/lump throat. This time it was different anxiety came first. I was checked out throughly and know it is in my head for the most part( I do have severe post nasal that will give me a lump in throat if not treated). I have went to a counselor, excercise regularly, no caffeine, started on lexapro.

I have read a lot of posts that talk about coping skills, supplements/vitamans, relaxation techniques.

Where do you learn about coping skills and relaxation techniques? In all the counseling I got a stress ball and talking. No talking about excercise or relaxation. Basically, I feel decent now but I want to feel like myself and don't mind putting in the work. Any inputs would be awesome. Thanks

Thanks! I am learning so much activating/non activating SSRIs. I did not even know what CBT meant. Lol. Thanks so much for the help and this forum!