Losing mucus plug at 31 weeks exactly?

So a few days ago after sex I noticed I had lost some of my mucus plug, wasn’t massive amounts and wasn’t anything offensive. Yesterday was by far the hardest day I’ve had in my pregnancy so far in terms of feeling like he’s about to fall out any second! Hurt to walk, to sit, to stand and felt like his head was between my legs all day! Today I’ve taken it super easy (I’ve had 3 naps!) and have just gone to the toilet and noticed this... it definitely has more of a tinge than the first time. Is it normal to be losing it so often this early on? I don’t want to call my midwife for no reason😬