Your interests will come back as you recover. If you are not feeling sort of normal after a couple of months with a new med, tell your doc and see if you can try another. No med will suddenly cure you, they work slowly and your recovery is a day at a time.

You do have a lot going on having a toddler and working, so just take it easy on yourself. Don't force yourself into anything. But as stated above, maybe try holding the instrument (or whatever) or google your interest and look at pictures. One day the spark will come back, I promise!