33 weeks

Laura • UK
Hey everyone, I'm 33 weeks today and for the past couple of days I've had some cramping.. There's no pattern to them it just comes and goes every now and again and sometimes with a dull pain in my back. This is my second baby and I don't remember having this with my first.. Sorry for tmi but I've also had lots of loose bowel movements too and seem to be going a lot more for number two..
What do u guys think? Is it worth speaking to my midwife or shall I just leave it and see how things go? 
Any help would be great, I really don't want bubs to come this early x