Pressure on pelvic muscles - help?!

I have had quite a painful day today - it feels like one of the twins heads has engaged and I am walking around frog-legged. Its been to the point of stinging with any baby movements and also have been having pain in my inner thigh. Occasionally it had also twinged when I have bent over and I have ended up limping around for a few minutes until it has eased. It feels to me like I am at full term but yet have ages to go....anybody else felt like this so early on and what did you do to ease the discomfort?

Yeah - spoke to midwife - she has no solution or answers - just told me to hold on.