Hi Elizabeth, I believe investing on heart monitoring devices is worth it. Smartwatches nowadays also include them. My favourite is HRV monitors as they reflect the issues well.

https://medium.com/sensible-biohacking-transhumanism/heres-why-i-envision-the-key-to-good-health-resides-between-the-spaces-of-our-heartbeats-e6a21798dfb2