Any suggestions please?

saw my midwife tuesday baby's head is 4 fifths engaged so not that much but this is my third pregnancy and i'm aware that with additional pregnancies it can be when labour starts when the head engages. I was dissapointed to hear it was only 4/5 because i'm having los of pressure down below and it hurts to sit down, get up and especially when walking causes me agony. I'm getting a few twinges but lots of scratch feelings in my front area. I have been diagnosed with spd but the pains i'm getting are different to that so any suggestions on what else it could be. I'm 37 weeks by the way. x