Should I call the hospital?

I've now been having contractions on and off for 4 days, mostly in the mornings. I'm not dehydrated as I drink lots of water throughout the day. The contractions are all about 30seconds each and anywhere from 3 minutes to 10 minutes apart for 30 minute intervals to 3 hour intervals. I've had a lot of back pain when they come on and my hips and nipples have been way more sore than normal. Yesterday I felt like I had to poop all day and every time I tried, I couldn't go. I also started getting these shooting, stabbing pains through my belly especially when I get up from sitting for a while and they stop me dead in my tracks cause it hurts so bad. I would hate to go to the hospital for them to tell me I'm not even close to being ready but at the same time I'm so incredibly uncomfortable and in pain that I don't know if I can even hold out until my next doctor app Friday. My due date is tomorrow. Should I call the hospital or are they just gonna tell me to suck it up, it's normal, and there's no reason to come in if nothing is consistent?