Hi Jo,
Its funny I am actually going through the same thing at the moment. Last week I was getting BH's on and off so my doctor thought he'd do a stretch and sweep on Monday. That certainly increased things, but the contractions aren't increasing in intensity and are still not regular. I am finding its getting pretty tiring, so I'm just trying to rest as much as I can. I think you will need to do the same. Apparently we will know when the real thing starts.