How will I know they’re contractions?

Amy • UK 🇬🇧 Married 💍 Mummy to Emilie 👶🏻 Secondary Teacher 👩🏻‍🏫

Everyone in my real life has said I’ll know when I’m in labour, but I went from 1cm to 2cm dilated in the space of 5 days so I’m clearly in very early labour now and haven’t really had NOTICEABLE cramps or contractions.

Like now for example, I’m up in the middle of the night and my lower back is aching, and I have MILD period like cramps. Are they early mild contractions? I just don’t know what to expect or whether this means I’m starting labour properly.

I’m 39+3