If a direct contact is simply not possible given the residency schedule, then how about a bedtime phone call. It might be just a few seconds, depending, but evidence that he's thinking of you.
Also, I'm not involved with a doctor but I am an RN and spend quite a bit of time with them. It's really somethi g to watch a person who is so self absorbed.
Maybe that is why I am grouchy and can't cheer when my husband becomes a director for yet another board at the hospital. We have 5 kids and my eldest wants to become a doctor.
Like any woman I am a Medical Assistant I sometimes question myself and ask myself what I would do if "unfaithfulness" came across. The foundation of our relationship began with God and he will always be in the center.