I would think the Remeron may be playing a fairly big role in your feeling so wiped out. That drug used to just put me in a freaking coma. It was awful. Hungover doesn't even begin to describe it. Half-dead is more like it.

I never had energy issues with Lamictal, but some people report it. It is a drug that seems to do almost anything in almost anyone. So. it's hard to say on that one, in my opinion.

This is why making two med moves at once is tricky and generally not advised. No way to know for sure which is doing what.

I hope it gets better soon. The only thing I could share from my Remeron days is to maybe think about taking it earlier and, of course, therefore, going to bed earlier. It's not ideal, but it might help with the next day. Sending you positive vibes and support!!