Hey girlies, looking for some advice!

So I suffer with quite severe anxiety. When I’m in specific situations I become really anxious, my heart beats extremely fast and my stomach churns making me feel sick. I have been diagnosed with it a while ago however I turned down medication as I wanted to deal with it naturally. It also comes with my boyfriend, when he goes on nights out I become severely anxious until I see him the next day, I don’t sleep, I don’t eat and my heart doesn’t stop, now I know people are gonna jump the gun ‘you don’t trust him’. No it’s not. I trust him with my life, we’ve been together a year and a half. It’s because I often worry that somethings going to happen to him, and that I’m not going to know because he often goes out and his phone runs out of battery, so I never know. I worry so much about him and I care so much. If you girls could please give me tips on how to deal with it. No negative comments about my relationship please as that’s not what I’m asking for!

Ps I am using kalms atm as you could grab it off the shelves, and I don’t want to be given strong medications from the doctors that are hard to get off.