Is this normal??

Rebecca
Hi just wondering If anyone can help I'm a FTM so I'm a bit oblivious to this labour process! I've rang my midwife just waiting for a response. I've started getting really painful period like cramps and my stomach tightens, they are only about an hour inbetween them, could I be in slow labour? I'm 40w1d due to have a membrane sweep in morning, I can't even eat my soup I just made because it's making me feel sick normally I could have eaten the full fridge by this time of day!