Hi Michelle,
I too am in the position of having to continue working during Jack's treatments and it's very hard to balance caregiver and wage earner responsibilities.
You cannot be there for him every waking moment and I totally understand that feeling because I felt the same way in the beginning. Trust me when I tell you it doesn't work. "Taking care of yourself" is different for each of us but I strongly suggest that you consider anti-anxiety medication to help you get through this. Zoloft and Lexapro are good choices. The first thing that we lose with the cancer diagnosis is our perspective and medication helps you stay focused - takes the edge off.
If there is any flexibility in your job you can arrange time off around doctors appointments etc. I took off on the days he was getting chemo so I could be with him, but organized a group of our friends to rotate driving/staying with him for the daily radiation.
Pretty much anyone who asked me "what can I do to help" got assigned something so I could continue working. Let people help you and don't expect that you'll be able to do everything yourself.
I know it's hard if he's away from home in the apartment but you may not be able to go there every night. Do you have friends or family who could take turns - if your husband even wants that. What are his preferences on this because you do need to consider that so your decisions are made as a couple. He may prefer to just sleep after treatments, Jack did that a lot.
Side effects vary and probably won't kick in for a few weeks so you don't have to hover over him. In fact, that made Jack more anxious when I did. Some things you just need to let go and hold the hovering for when he really does need it.
Steve should be well enough to walk across the street to the apartment after treatments. He's not driving himself - although people do that too.
Have you seen the getting through it posts on the forum? There's some great suggestions on what I wish I had known.
Keep reading and hange in there.
Regards JoAnne