Hi, I usually post on the Ulcerative Colitis forum, but I have high blood pressure also. I can totally understand your concerns. My BP varies throughtout the day. It has gotten 198/100 because I got so stressed out when I went to the GI doctor. Just scared about this disease! As soon as I got home it went back down. Yes, my BP will read as low as yours. It is perfectly normal for your BP to vary throughtout the day. I'm not sure if it drops lower during the night or not. I try not to think about it. If I stress out my BP shoots up along with my heart rate. When I eat right my BP is usually low. I try to remain calm and relax but sometimes when I go to the doctors I panic. Hate this about myself. I just wanted you to know you aren't the only one who expierence this.