I got 40 units of Botox during 9-10 weeks pregnancy. Will this harm my baby?

Based on available information Botox shouldn’t be an issue. Of course Botox is never used to treat cosmetic abnormalities during pregnancy, but since this after the facts it’s understandably worrisome. 

Once an injector knows the patient is either pregnant or breastfeeding - they are discouraged from injecting cosmetic botox.   It's more from a lack of research and a fear of being sued if some unexpected birth anomaly occurs (which is probably not related to the treatment).   
However - to reassure you - both of my children were born normal and my wife had received botox prior to knowing she was pregnant.   It's similar to women who consume alcohol before finding out they are pregnant.   Once you know you're pregnant - you should do everything that is reasonable and safe for the protection of the pregnancy.   A healthy normal pregnancy is never guaranteed even if you do everything "safe".   So I would not worry about the botox at this time.   I would not receive any more injections until after you have the baby and finish breastfeeding.   Also - consult your OB-GYN as well.