PVC's Feel like missed heartbeat

I am suffering from war-related trauma: I was an American officer volunteer in Ukraine and just home 1 SEP. The lingering trauma has produced allot of anxiety. I always do intense workouts -especially cardio and have stayed on that pattern notwithstanding some symptoms of anxiety. However, the past few weeks I've experienced the sensation of feeling like my heart is missing/skipping a beat. ("PVC's"?). I went to my PCP, who examined me. She noted that my BP was normal, and had no associated symptoms like shortness of breath, trouble breathing, etc. She suggested electrolytes, magnesium, stress management., but did not see the need for med's or further evaluation. But the sensations are affecting me at night. Like last night: in pre-sleep mode, I "felt it", and it was happening regularly -to the point where it prevented me from falling asleep within a normal time. Similarly, it happened again after I woke up for the bathroom. I fear this is in my head now and will keep affecting my sleep; and with lack of quality sleep, I fear the PVC's will continue or get worse -which could prevent me from exercising and being joyful or productive. My PC again today said it will take time and that it's highly unlikely there is a greater heart issue. Just wanting tips on how to cope with these sensations, especially at sleep/night mode. Thanks