I'll reiterate what everyone else here has said: skip the juice!

If a longer form of fasting (like 2-3 days) seems impossible at this stage, maybe you can be more consistent with your intermittent fasting, slowly stretching out the time of your fast? It shouldn't, hopefully, be too burdensome to push to 20 or even 22 hours from where you're already at.

If you could semi-consistently do something like 22 hours per day and keep that up for a few weeks (or longer!), you'll give your digestive tract and overall body a much-needed break BUT will feel like you're still living a more normal life.

What do you think?