loss of all symptoms at 12 weeks normal?

this is my first pregnancy, and I am now 12 weeks and 6 days. since the day I hit 12 weeks all of my symptoms have disappeared. no more occasional nausea, so much more energy, no more food aversions, no more sore boobs, etc. the ONLY thing I still have sometimes but not even as often is the occasional light cramping but very rarely. my stomach is still flat and no sign of uterus popping yet. is this all normal or should I be worried? saw heartbeat at 10 weeks 6 days and heartbeat was 171. next doc appt is next week but I'm going crazy worrying that I've had a missed miscarriage or something. need reassurance ladies 😞❤️