condoms and I use to chart my cycle. It worked 4 years for not getting me pregnant

I had just bought the thermometer a few days before I found out I was pregnant with my child. After that I always charted during certain times of the month we just wouldn't have sex unless a condom was involved (when I was with my ex)

I may go on the pill someday again but with hypertension in my medical history along with all the other stuff. I think it is safer not to take the pill a this point.