31+3 and panicking

Started having contractions at 28 weeks was confirmed it was definitely contractions and not braxtons and that my baby will most likely be premature . They started to die down a little and was told I had a infection and was treated for it. The past week I’ve noticed my contractions have gotten a little stronger to the point I’m not coping with them and Tuesday night I started having ‘lightening crotch’ today it’s got worse to the point it really hurts when I sit down or walk. I’m not sure if I’m loosing my mucus plug or what? But it’s quite a lot, gooey type but no blood just a yellow/ egg white look to it? I’m unsure if it’s anything to be worried about ? She’s also low down I’m thinking she’s engaged and pushing on my cervix? I’m unsure this is my first pregnancy. I have a midwife appointment Monday is it worth waiting that long or ? Help 😂🥴