M.P.
I suggest that you get treatment for your depression and ADHD. Both of those cause memory loss. Talk with your doctor. There may be other medical reasons for this. You can take medication for depression and ADHD or you can try some of the natural OTC mood lifters such as St. John's wort. Ask what would be safe for your baby.
I also suggest that you get counseling to deal with the depression and the anxiety that the depression is causing. When one is depressed their mind isn't as sharp and it's easy to follow into patterns of worrying about everything which increases the depression causing more memory loss. Counseling can also help you with the ADHD. There are "tricks" to use that help you focus and remember.