Congratulations on your baby! There is no research about the effects of Botox on a fetus. This most likely happens several times a year due to how popular Botox is. To my knowledge there has never been a case of problems associated with this. There is very little migration of Botox once injected...
When you refer to "space" you're referring to volume. One cc of Juvederm is one cc of Juvederm regardless of how much of an area it's spread over. Hope this helps.
Thank you for your question. This is probably the Tyndell effect. You can improve this by dissolving the filler with hyaluronidase. If there was staining after the injection this can also be hemosiderin staining. I recommend having this evaluated by your injector. Best of Luck!