I didn't feel much of anything to be honest, I was feeling really mellow and then I had some (TMI warning) smelly wee and a funny looking chart (it was really flat) so just decided to test, far too early and with smu, but oddly it was bfp! I am definitely getting the crampy, shooting pains now though, some of them are like I've pulled a muscle, some are very stabby and localised just to one spot - ouchy!
Good luck!!!