Extremely low mood after increasing my dose to 100 mg

Hello there Lamictal friends,

I'd like to ask if others have also experienced sudden shift to horribly low mood after increasing their dose to 100 mg?

I started Lamictal for CPTSD more than a month ago. The first 4 weeks while I were on 25 and 50 mg were actually great. My mood was much more calm and life felt significantly easier. I did experience some headache and sleep problems at first, but it was definitely worth it even with the slight side effects.
Then, I increased my dose to 100 mg per day and soon my mood went significantly downhill. I've been on 100 mg for 1.5 weeks and I'm getting nightmares and flashbacks from my trashy childhood; I'm anxious and feel like I have this heavy, dark matter put on my shoulders. I might cry out of nowhere and not know why I'm even crying. So yeah, not doing great at the moment.

I have scheduled a call with my fancy/expensive psych in a couple of days, but I still wanted to ask if others have experienced the same issue when increasing their dosage? Did it ever go away and how long did it last?

Thank you in advance! <3

UPDATE: Talked to my psychiatrist and my dose is now lowered to 50 mg per day. :)