Hey Dan
I dont no how much help i am going to be, i had on and of cramps and pains in my pelvis
and in my lower tummy when i was about 17 + weeks i was told it was just growing pains as long as you dont have any bleeding then i wouldnt be to worried but if you would feel better then i would go and see your Dr or ring the midwive. I hope that you feel better soon and try and sit down and put your feet up
The pain sounds just like growing pains.

I get the growthing pains alot now sometimes it feels as if bubba is gonna pop out...lol

Take care i hope you start to feel better soon

Eve