On my stomach I have gained like a second dark line on my stomach on my lower stomach , and light stretch marks on the top of my stomach ... Why ?

Very emotional at the drop of a hat out of nowhere today .

Diarrhea everyday for the past 4 days . Throwing up soft foods .

My stomach is very unstable .
I cannot hold a lot down before I puke.. Wondering why ..

A little bit about myself ?
I'm very tiny and short hahahaha. I love to sing , and love babies in every way ! I am trying to conceive ! I would love the moms to be or mothers of a beautiful child to help give me tips on what works best to conceive .