A quick question. I've been on 50mg of ateno

for the past 6 years, no problems at all, everytime I did check my BP it was around
130/80. The last few times I went to my Dr (also plagued with a ton of stress symptoms) my bp was higher 160-70/90-100. And my heart rate was 75-85. He decided to double the dosage. Now I'm taking 100mg every day. Ever since then or around when I doubled the dosage I feel worse, dizziness, difficulty breathing etc. My Doctor attributes it to stress/anxiety and says it has nothing to do with the ateno

.
I've checked my BP over the past 3 weeks (at home) and it's been between 135/90 on the high end and 110/65 on the low. Heart rate has always been between 49-75. When I've been feeling bad as mentioned above, my pressure has been below 120/70 and heart rate around 50.
The problem is that everytime I'm at the Dr's office it's never below
135/85, ever. And when I complain about the "overdose" of ateno

he says "we're just making sure you're covered on the high end".
Initially I thought it was morning anxiety but now that I monitor it more closely it is infact morning but a couple of hours after I take the ateno

.
Any one experienced this before? What about the difficulty breathing or heaviness in the chest (not sure how to describe this) is that due to low BP?