Does Beer Effect On Blood Pressure?

I went to the Dr's. office about 3 weeks ago for a check up and they told me my blood pressure was 130 over 100. The nurse said "it was slightly elevated". Now, here's my question....If my blood pressure is only slightly elevated and it has NEVER been before in my life(I'm 33) why now, 3 weeks later if I drink A beer does my face and neck get all flushed and hot ? Could it be that the alcohol in the beer is causing this abnormal reaction ? Trust me when I say this. I DO NOT drink heavy at all. I'll go through a 6 pack on the week ends at most. Also, I have been fine for the last 3 weeks, this flushed feeling I am getting has just started last night. What gives ? I should add. The Doc gave me two scripts. One was Erythromycin for adult acne.(something I have fought all my life). Also for Amitriptylin(25mg) to help me sleep. I work 3rd shift and I have a horrible time trying to sleep. I called a pharmacist and spoke with him about this, and he said that typically a few beers with the scripts I'm taking wouldn't hurt a thing.