I'm 29 weeks pregnant over last weeks or so been having Braxton hicks all the time on and off which midwife says is fine but they seem to be gettin stronger everyday keep getting back ache since a couple days ago and today went toilet and when I wiped there was a clear thick stringy lump on tissue this happened twice, is that my mucus plug? Nit had discharge like this. Im.worried about preterm labour but don't want to feel like im wasting midwifes time