What Starsky said. I have recent experience with this. One thing to consider if you opt for this: think about whether or not you want to share this with your spouse right now. Depends on your situation and your spouse's likely response. My W knew and it was ok, but I felt a little better about it when I was just taking care of it one my own, I mean between me and my doctor. Personally, I wanted her to see the changes I was making as "me" not the meds. So I figured, well, the books are just for me and this is too. Regardless, as they say, do what works.
I did not tell my wife (although she eventually found out), nor would I recommend that you do. If she DOES find out, however, just say "Considering our situation, I'm doing everything that I need to in order to get support and keep up with my responsibilities" (or some such). Certainly don't apologize for it -- I didn't!!!
Interestingly, at one point my wife found my prescription, and I caught her (not in person; she had placed a note in her drawer, IN HER OWN HANDWRITING, noting the name and dosage of my anti-depressants. Stupid!). So a few days later, I just left something on the kitchen counter, in plain view, that I had printed off the internet about how it's a FEDERAL FELONY to violate someone's HPAA privacy and all.
I saved her handwritten note as evidence, in case I needed it. Fortunately, we reconciled, but jeezus . . .