I've been having them for ages - my record was for around 10 hours straight a week ago or so
I can 'see' mine now - basically my whole stomach goes hard, so depending on what position I'm sitting in, they can be uncomfortable.
Mine are never what I would call painful, so definitely not like I would describe a cramp like, more just a really tight feeling - like everything is being squashed up inside me.
Mine are not regular in their timing, and I feel them more at the top of my tummy, rather than where I would feel period cramps (that said, I am 38+5 so a fair bit more pregnant than you).
Hope this helps and that all is ok rosiejayne.