Question about beet juice and side effects

I discovered several days ago at the periodontist’s that my blood pressure is high. Saw my family doc. He doesn’t want to rush to medication, since my bp has always been normal. Wants me to get data over the next few weeks - I.e., lots of readings. In the meantime, I did some research and learned about beet juice, hibiscus tea, and the importance of the sodium-potassium balance. Used beet juice powder at first. Made me feel a little ill. Got some of the juice and drank a cup this morning. After lunch I had diarrhea that looked exactly like the juice. It clearly and literally went right through me. It was disconcerting to say the least! Did I drink too much? I want to continue because it seems to be working. My bp is slowly coming down. Thanks for any insight. I’m new to this.