So I have been on venlafaxine 2wks and 3days. I just started 75mg 2 days ago. Today I feel drugged, spacey, heart racing on and off, nervousness, keep feeling like I need to use restroom, keep feeling like I'm on the verge of a panic attack. Is this normal at first? Will these symptoms subside? I used to take venlafaxine years ago and had no problems. Just feel so off