Mine did this on Friday afternoon. I have previously had migraines/vision problems and protein in my urine so I was quite concerned to start with, but I elevated my feet and stripped off to cool down and eventually they went down so I think it was heat related. It is really good that you have no other symptoms, but if you're concerned I'd call your Assessment Unit just to put your mind at rest.
I live on the North East coast so anything about 10 is a heatwave for us! ;-)
Hope they go down soon. Let us know what they say.
P.s. I feel your pain with the over-due-ness! DS was induced at 42 weeks. I was so impatient to meet him at the time, I just wanted him out! Now I look back and remind myself that I did such a good job of keeping him comfy and provided such a lovely home for 10 months that he didn't wanna leave it! :-)
I rung and they said not to worry as long as I have no other symptoms I'm going in for monitoring tomorrow anyway do they said if I'm still concerned it will be dealt with then. I have so far refused induction hence the monitoring so hopefully baby is still hapoy in there and I can give it a few more days to make an appearance. I feel like my body won't do what it's supposed to though! Hah