Advice??

Been having contractions all night and morning just started timing and there 4-6 mins apart for the last 25 mins but not that painful more tightening and shooting pains through my back and round front very low. Lost a massive amount of plug today but no blood and feel like I need a poo but can't do one. Due tomorrow and just wondering if this sounds like anyone's labour or am I getting my hopes up. It's putting me about because the pain isn't terrible like I expected 
Thank you ladies