Hello and welcome to the forum. That sounds like a really frightening experience and we're sorry you went through that. If you have anxiety, this can be a bit difficult for that condition, but typically, regular monitoring of blood pressure is recommended under these circumstances. Do you have a home monitor? And with this situation, I would think they'd suggest a cardiologist to make sure all is well. This article gives some pretty basic and easy to understand information regarding sudden and erratic spikes and falls of blood pressure. https://www.healthline.com/health/fluctuating-blood-pressure Things like an overactive adrenal system could be involved and yes, you'd work on that with an endocrinologist. Stress and anxiety itself can actually cause these spikes. This is something for you to work on with a psychiatrist. But overall, the first thing to do is rule out a cardiovascular issue. An emergency room is great for acute situations but not for chronic problems. Monitoring your bp is important. Although I realize this may give you more stress initially. Monitor it about three times a day at different times. Calmly sit with feet flat on the floor and arm /blood cuff at heart level, think peaceful thoughts, stare at a picture of the beach or something calming to you. If you rule out actual cardiovascular reasons for the bp surge, then it's time to look at secondary hypertension causes. https://www.mayoclinic.org/diseases-conditions/secondary-hypertension/symptoms-causes/syc-20350679
Please note that all of the things that help with hypertension should still be instituted. These include losing weight if you need to, eating a heart healthy diet, limiting sodium, regular physical exercise and proper sleep.