Ugh, I’m so sorry. Panic attacks are terrifying! I started taking 37.5 and day three I woke up in a panic attack as well. My doctor prescribed me Hydroxyzine for my really bad anxious days. It’s like Benadryl/diphenhydramine and it’s non-addictive. It just makes you feel calm and a little sleepy. I’ve been on Effexor for 3 months now and recently upped my dosage to 75. I’ve been taking the hydroxyzine before bed (while I get used to the new dosage) and it helps me sleep throughout the night. If the panic attacks continue, or the panic feeling is too unsettling it might be worth talking to your doctor about! Side note: the feeling definitely decreases overtime and before you know it you’ll feel “normal” again!