I would like to share two links on practical helps for fasting.
If you are pregnant or breastfeeding please do NOT ‘fast’ food!
You can certainly ‘fast’ media, sweets, words, etc. For many years I desired to fast food, but I was either pregnant or breastfeeding. I wasted many years lamenting (complaining and grumbling, really) because I couldn’t fast. Please don’t do the same. Embrace the beautiful season you are in and know that the Lord is far more interested in your heart being devoted to Him than you ‘showing’ your devotion through fasting.