2nd trimester feel too good anxiety?

Rikki

I’ve had 3 miscarriages and this is my first time ever making past the 1st trimester. Which at first was excited because my 1st trimester was rough, nausea, food aversions, weird cravings insomnia ect. I’m 17 weeks, I feel amazing, energetic and ALL 1st trimester symptoms are gone. Is this normal?? Because it has been giving me massive anxiety, at least with my 1st trimester symptoms it let me know I was still pregnant. I’m terrified that there will be no heartbeat at my next appointment. Help! Suggestions?