Symptoms at 9 weeks

So, I am 9 weeks 5 days and my symptoms seem to have been alleviating the last week. I was experiencing some wicked nausea, really sore boobs, consistent light cramping and hungry all the time. This week my symptoms have lessened greatly and I’m starting to worry. I had an ultrasound last week and everything looked good with a heart rate of 175. Anyone else experiencing their symptoms decreasing like this? I just get scared seeing so many posts about missed miscarriages. My anxiety has been skyhigh because this is my first pregnancy and have no idea what to expect I was told symptoms should be increasing.