Hi Rebecca, I'm sorry to hear you're having health issues. I know all about trying to work on my business while life tries really hard to make it really hard :)
I go though periods of blogging quite a bit and then like now (pregnant, husband's away, toddler has no childcare for the summer, heat wave, you know fun stuff) I am trying just to blog once a week.
So I guess what I'm saying is that having realistic and obtainable goals is how I keep feeling on top of things. That said I am dropping other things. My blog brings my shop lots of traffic so it's a priority. Treasuries used to be but aren't anymore so I've cut down on my participation on treasury teams. I do have good results from guest posting on other blogs, but only huge ones so as much as I like supporting new blogs and the little guys I've committed to saying no to every guest post, giveaway, and interview request unless I've worked with them before or they have massive traffic that is exactly my target market until this new baby is 6 months old. I have also dropped all my local markets until next year.
Wearing myself out is not in the business plan! Good luck!