feel worthless

I have no job, no friends. I stay home with my 3 1/2 year old & take care of him & the house, & I am 8 months pregnant with my second child... my fiancé works out of town all week, so it's just me & our son.. I just feel so worthless because I don't have a job & cant contribute financially... it all falls on him to do & pay for.. we're planning to get married in may, but at this point I just want to go to the courthouse & get married so he won't have to pay a ton of money for even a small beach wedding.... & to top all that off I kinda don't even want to have a baby shower now, because I feel so bad because his family is really the only ines that are able get us anything, cause all I have on my side is my mom & she lost her job back in December so she's not able to buy us anything nice... I'm just so full of emotions & just want to cry...