Sudden loss of symptoms? 9 weeks, 4 days

The only real symptom I had was nausea every single day beginning at 6 weeks. The nausea would hit hard but yesterday, it disappeared and has yet to come back. The night before that, I had real bad nausea. I had my dating scan exactly one week ago and baby was healthy with a heartbeat of 158. Should I be worried with the loss of symptoms or is this my body finally adjusting to the hormones? Any advice is appreciated. Thanks.