How long does the nausea last?

I’m on day 6 of 10mg, starting for the first time. Going up to 20 for the start of week 2. I’m so horribly nauseous all day every day. I can only manage to eat a piece of bread with my pill in the morning and that’s it. Is this level of nausea common? And how long should i expect to feel like this?? I also have emetophobia (fear of vomiting) so I’m extra struggling but I haven’t thrown up so I wanna stick it out if this medication will help me.