Do you feel that you overwork or underwork when you manage your own schedule?

I just started a new job and I have total control of my schedule (except for scheduled supervisions and meetings) but am on-call 24/7 and am available to work weekends too. I feel that I can never enjoy “time off” not because I am on-call (because it hasn’t been a problem) but because I don’t have a set schedule. It’s hard to clock exactly how much I am working since there is prep time, travel time, and phone calls from home.

Any tips? Anyone in a similar situation? I have only had this job for 2 months and am still getting used to things, but am already feeling stressed!