Other than what is recommended, take one day at a time, and get through that. Only you can push yourself forward to help prevent ORN, which can occur in patients with prior radiation to the mouth, jaw, who are having surgery, extraction, and dental implants, so think about that. You are a cancer survivor/fighter, and this is minor in comparison, so you can do it. Some had family members outside the tube talking with the patient on the phone, some the Tech did so.
I'm surprised their putting in dental implants, but may depend own the amount and areas radiated? I need to have HBOT again for extractions, but have to wait for a clear PET/CT.
As to the tech's, they took my blood sugar before having a dive, and actually had to be higher than normal, over 140, being the HBOT would lower it, so sometimes I had to drink juice, eat cookies and wait I until it raised, and the same after the dive, and if too low had to drink, eat again, and wait before going home. They suggest you bring your own snacks in case needed for such. The same was done with my blood pressure, which HBO can lower. I was lucky since a doctor was present in the room supervising the two techs, tubes, patients, and spoke to them every session.
I never felt great after HBOT either and was light headed, dizzy, eyes needed time to adjust, so your not alone, but do let the staff, doctors know.
I hope this helps.