Side arm symptoms and conditions

i so happy to have found this forum. i'm 47 was given 25mg of Toprol XL by doc for high blood pressure approx 9 weeks ago. also have history of panic attacks and rapid pulse rate and have been under alot of stress. first week on med, found my B.P. dropping too low 90's/50's, feeling dizzy and extremely tired in the middle of the day. called doc and was instructed to keep taking it, i'll get used to it, and don't make sudden movements!!! i didn't take his advice and cut pill in 1/2 to 12.5mg. then got extreme muscle and joint aches (a feeling very much like lyme disease) this was accompanied with profuse sweating upon minimal exertion and just no energy and shortness of breath even during an easy moderate walk. i think my heart beat has become more irregular. 2nd month into this low dose noticed chest pains so i tried the pill every other day. this weekend got the scare of a lifetime, however, got out of bed and entire left side (arm leg and foot) were numb. i had a major panic attack. this stuff is poison. i haven't taken a pill since. i'm going to find a different doctor this week (a D.O./MD) and hopefully devise a hollistic approach before i try another drug. ps also weight gain, but that's seems to be the least of the bad side effects.