I have had trouble walking (the bowling ball in my lower regions feeling!) over the last few days, & recently started sleeping propped up as sleeping on my side is way too uncomfortable...along with constant dull ache in my back I wondered if this was a sign that LO is engaging (I'm 39 weeks) But today it's so much easier to walk (aside from the backache which I still have). Can this be a result of lightening or am I just having a lucky 'feeling alright' day?