Is it OK to cry ?

I'm 4 months pregnant with my first baby I hardly ever cry right now I'm really upset I don't know why one reason would be this site is pissing me off and a bunch of other reasons. I'm a tomboyish kind of girl I'm not one of those girly girls who cry at everything if I do feel upset sometimes I forget about it and let it go. Especially around my wife or my friend or even my sister I don't let them see me cry only if I have to. Is it ok to cry ?