No pregnancy line

I just realized last night as I was in the shower that I don't have the dark line (linea nigera) I'm assuming I'm not the first woman to not show this at 21 weeks just thought it was interesting. This is baby #2 and with my first it showed up by now. Also who else is having issues with there hubby?! I just don't feel the connection I want, I don't feel like he cares as much as I'd like..i just wanna feel like I'm his precious pride and joy all the time especially right now when I need it the most. Ugh I don't know this being a woman business is rough.