I had the exact same thing when I was 31 wks pg with DD - I presented to hopsital and had my DD in my arms (albeit briefly) the next day...

Get it checked out hun. Whilst I had the pains I presented to a GP and apparently my BP was 'normal' so I went to a hospital. Hospital made me provide a 'sample' to check for protein.

In the meantime put a wheat bag or hot water bottle on the pain - it provides temp relief but won't solve the underlying problem.

Keep us posted!