When will my appetite come back!? 😔

I've been struggling with nausea and loss of appetite since the beginning of this week. At first I wasn't sure if it was because I've started eating a healthy breakfast in the morning and just started to feel full but then the nausea came along now I feel sick just looking at food! 🤢 I've always had a good appetite and have never experienced this before.

Does anyone know how long this usually lasts for and if I can do anything to help get my appetite back?

I've tried having a few ginger biscuits in the morning but it doesn't really help.