Tweak those nipples and DTD of you are up for it. Nipple stimulation is the best though, maybe you could do them both together!!! hehehe
I got told that sometimes the contractions stop if you are tired, so stay well rested with just enough exercise to keep things moving, but resting in between like you did is perfect.... and who knows those contractions probably got things moving anyway.... I walked around 4cms dilated for weeks, and then BAM a baby in less then two hours (first baby!)
Have a beautiful birth, it really is not that far away now!!!