Symptoms disappearing 7w 4 days

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I'm in a little panic I have had really bad sickness and nausea since 5 weeks and it has suddenly stopped at 7 weeks and I haven't had anything for 4 days now. I have had the odd random wave of sickness in the morning but literally lasted seconds. I find it so odd to go from constant sick to this. Anyone else experienced this or is this not normal? Xx