Lamotrigine - I recently had one glass of wine, it felt like I had had three glasses. Very?

The interaction between the anticonvulsant ( Lamotrigine) and alcohol made you feel the way you did.

There is a moderate interaction between Lamotrigine and alcohol, moderate meaning:

Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.

Interactions between your drugs
Moderate
ethanol lamoTRIgine
Applies to: Alcohol (contained in alcoholic beverages) (ethanol), lamotrigine

Using lamoTRIgine together with ethanol may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people may also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit the use of alcohol while being treated with lamoTRIgine. Do not use more than the recommended dose of lamoTRIgine, and avoid driving, operating machinery, or engaging in potentially hazardous activities requiring mental alertness and motor coordination until you know how the medication affects you. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

https://www.drugs.com/interactions-check.php?drug_list=1034-14582,1430-0

I am on 150mgs. of Lamictal (lamotrigine) and I decided to stop drinking when I was diagnosed with bipolar disorder many years ago, in my case the best course of action taken was to stop drinking. I also take other medications, but that is/was my choice., everyone is different as well as choices/priorities.