You will be surprised how quickly the time goes by. As you know by having read all the ladies' suggestions here, be sure to take good care of your skin. "Slather" up with aloe vera gel and any prescriptions your doctor prescribes, although remember, no gels within two hours of your treatment. Also, my prescription ointment had to be totally washed off before treatment.
I had four tattoos to mark the location for the beam, but at times, they also used a pen. This pen marking got on my clothing a couple of times, before I realized it. So, you may want to visit the restroom right after a treatment that includes "pen marks", and wash it off before dressing.
And my last little tidbit of information... being the "chocoholic" that I am, I brought a big Costco sized bag of Hershey's Kisses to the Cancer Center receptionist. She doled out two kisses to me after each treatment, as my "reward" for being a good patient! I also asked her to share them with anyone else who might need a chocolate fix. Then, on my last treatment day, I took a party bag full of Kisses for the patients, and one for the staff as a thank you for all their loving care. I may be forever thought of as the Kisses Lady!
Good luck to you, and you will be in my thoughts and prayers.
Take care, Jean In WA