HELP

I'vebeen having brief headaches on and off for a few days now on the left side of my head in one little spot. I am shakey right now and I felt like my left arm got weaker for about an hour earlier. I have had 3 bad panic attacks in the past two months and I'mcurrently taking vvenlafaxine daily. I'm scared  of a brain tumor.  Oh and I get dizzy from just walking.

Most likely don't have a brain tumor. But get an MRI just to be sure. You are talking very common sensations associated with GAD. Your mind plays tricks on you and makes you think the worst. Sometimes getting on new meds can cause headaches. They eventually go away. I hope you are seeing a therapist as they really help explain the processes going on in your brain to help you make sense of it all. 

Headaches are gone. Now it's pressure Iin the head and dizziness when walking. I have new symptoms everyday. Thanks for your reply