10 week symptom changes

I've had morning sickness for about 2 1/2 weeks, last week being the worst. I had to call out of work a few times and leave early. I was constantly dizzy, dry heaving, and tired. Well starting yesterday(9w6d) I noticed my nausea wasn't as bad and my breasts weren't as sore as they had been. Today I've noticed the same thing, no nausea and no sore breast. I have an at home pocket Doppler that I've been able to use and picked up the heartbeat right away when I first got it in the mail at 9w1d. Well both yesterday and today I can't seem to find the heartbeat. I told myself not to rely on the Doppler especially early on in the pregnancy but now that I'm having a loss of symptoms as well it's starting to freak me out. I had a miscarriage in December and about 3-4 days before losing the baby naturally I had started losing symptoms. I hope that I'm being paranoid and it's all in my head, my next appointment is this Friday but it won't involve an ultrasound. Not sure if I should call my doctor or let it go for now. Really scared of losing another baby:(