When you’re sick and feel tired, the magick you do in this time will be affected?
Logically, your reduced state will mean you don’t have the energy you could typically invest in magick. I would recommend just taking a break so your body has time to heal itself faster.
Healing magick. Take a shower, make the water as hot as you can handle. Then line your spine up with the stream of water. Imagine a green or black slug dripping off of you and evaporating as it enters the drain.