Getting so worked up I’m feeling physically sick

My partner is leaving for almost a week on a 20 hour road trip to help his mother move and I’m getting so worked up about I’m getting physically sick. For context, I’m going through trauma therapy and have been diagnosed with panic disorder paired with CPTSD with adult separation anxiety. I go once a week and have been for 3 years, but just moved to a new therapist because of insurance issues.

I’m just dreading everything. I’m going to be alone. I’m terrified for him on the road. I’ve tried so many different things to ground but nothing seems to work unless I sedate myself with medication. I hate this.