I have no idea if this would make a difference with any med but a woman's hormones are NOT back to normal when infant is only 4 mon old!!

I have been in your shoes & it was tough.
You put your thoughts & experiences on here for support.
Hopefully the lamictal will work better with time or pdoc can make a med change that will work better.

Don't know how much of a support system you have but just having a 2hr break to yourself helps so much. I had no one but we survived (un-medicated at the time).
Lamictal has really helped me but I also take 2 other psych meds & that combo has worked well for me for years. This may have been combo #7 or more so don't give up just yet. Ask pdoc and T for help.

Take good care of yourself.