14w pregnant and In pain 24/7

Emma
I'm having 2 babies back to back (my son is almost 9 months) but I'm having cramping pain-stabbing pain nearly all the time. It's come to the point where I can hardly eat all day and I'm having a hard time just holding my son. The ob I have says having pain is normal and has brushed it off every time I bring it up, just that the baby is growing. I dont know weather to go into the hospital and have them check it out or wait until tomorrow just to be told it's fine. Sorry to complain so much I'm just looking for advice :)