Anxiety relief. Already high strung- is Bupropion SR a possibility?

About 6 years ago I started to suffer from some performance anxiety- just out of high school. I've been on a few SSRI's, the last one being Zoloft- it worked well. I gained alot of weight on it and weaned myself off it. It is about 10 months later and my anxiety has returned, even worse. It's not just about performance anymore, its about everything. From health, social situations, and nothing at all- just anxious. I know it is irrational to feel this way- but I can't control it in many situations. Anyway, my doctor prescribed me Wellbutrin SR, Atenolol (a beta blocker), and klonopin. Well I've taken klonopin before- no prob. Im scared to take the others. My blood pressure isn't high, is it safe to take a beta blocker? And will Wellbutrin make more anxious? And is the combo of these meds even safe?

Thanks
May

[MayPanic]

When I'm not anxious my blood pressure and heart rate (even 60) are normal, but when I am at the verge of a panic attack my heart rate can reach heights of 150-160, but most of the time stays between 105-135. I get anxious around doctors so I've had to wear a haltor monitor- its normal at home. My new PCP told me to try Atenolol when Im at home to see if it effects me, but my heart rate wouldn't be high, is that okay?

My anxiety symptoms-
sweating, shakiness, out of reality, racing heart rate, increased BP, tight muscles

[MayPanic]

Thank you,
May