Drop of blood pressure who last since 2 months part 1

Hi, i'm 35yo, weight 165 pounds (lost 55 pounds in the last 7 months), smoke 1 pack a day (try to quit), don't exercise cause of the weak blood pressure, eat healthy, have some anxiety disorders, extreme anxiety since more than 1 year (panic with ago, OCD, social phobia). My current meds list is : 6mg of Klonopin / day, 1 mg Xanax /day, 2.5mg of Inderal and lot of vitamins (calcium, iron, D, A + centrum complete) that I have to take cause I had a gastric by-pass to loose weight 10 years ago.

I'm following by a Cardiologist, always had a normal-bordeline blood pressure of around 135/85. Had first meet him last year cause I fainted 3 times and my pulse rate was low all the time (under 60). We run a lot of heart tests at the time to rull out the fainting episodes and the slow heart beat without finding anything wrong with my heart (stress test with an echocardiography, holter monitor 24 hours, blood tests, X-ray of the lungs...).

I saw him again in february cause I was rush to the ER for a supraventricular tachycardia episode and he RX 10 mg of Inderal to control the tachycardia. I start also having once in a while chest pain, but he wasn't very concern about it and said it was not cardio related. He Rx another holter monitor 24 hours, a blood pressure monitoring 24 hours, a stres-test on a treadmill, blood tests... no problems was found and my results was normal.

The main problem is that suddenly in the begining of July, without any kind of stressfull event in my life who happen, my blood pressure drop from the normal-bordeline range to a low blood pressure of 95-105/50-55.