Extreme RSA from quitting?

I’m about 3 weeks clean now. I have had intense anxiety, fatigue, crappy sleep, much higher BP, and chest pain. All of these are symptoms I have seen on this subreddit. However, one symptom I’m having that I haven’t seen on here is a respiratory sinus arythmia with a crazy range. Whenever I breathe in my heart rate goes up to 90 and when I breathe out it can drop as low as 55. Has anyone else experienced this? Also, BP readings of 140/80 are pretty concerning considering I’m 3 weeks in. I’m hoping people report that being a symptom and that it will return to normal eventually. Thanks!