What Causes Elevated BP Levels, Slight Headache And Fatigue?

Question: This morning I woke up feeling weird. I had a slight headache, my legs felt tired, kind of a knot in my stomach and my heart was racing and pounding. I felt out of control of my body. Using my phone, I checked my heart rate (BPM). It was 110. Normal for me is around 70. I checked my BP, again using my phone, it was 144/95. My normal average around 120/70.
I sat down for a few minutes and talked to my husband about what I was experiencing. After a few minutes, I got up and walked upstairs. When I got up the stairs, I thought my heart was going to beat right out of my chest. I checked my heart rate and blood pressure again. The numbers were very similar to what I reported above. I had to just sit for a few minutes until I felt this had subsided. I was feeling a bit shaky and weird.... but that could be because I was scared and uncertain. After resting for about 45 minutes, I've gone about my normal activities of the day. I've felt "normal" since. Except that I've felt tired and a bit short of breath.
Could I have had some kind of heart event? This is new to me. I've had a few very mild episodes where I felt like my heart was pounding hard over the past few years (usually at night). but nothing like I felt this morning.

I'm a 54 yr. old female 5'2" 160lbs. No prior health issues. On no medications.