Could well be the drug is causing it. It happens particularly with younger people it seems. I know it’s a drug to treat depression but not at the low level of dosage that you are taking I suspect. Get back to yr medical professional quickly as you can. Maybe it’s not the right drug for you. Obviously MAV can cause people to be depressed or anxious too but if you have been OK up til now … and you coped with 2 very trying years looking for a diagnosis and had a good morale, that might be a further indicator that the drug is causing it. Have a word with your doctor as soon as you can and meanwhile stay safe and look after yourself.
Sorry you’ve had to come here because of the reason but welcome. There’s alot of fellow sufferers about. You are not alone and certainly not crazy. MAV is a strange beast to come to terms with but it’s not for ever and you’ll find lots of relevant info on this forum to help and support from other members who know what you are going through. It’s not unusual for people to spend years before they obtain a diagnosis. Still you know now and that’s bound to be a step in the right direction so, until you get hold of your doctor, try your hardest to be cheerful.