nicu?

I am scared. Im 34 weeks and 4days pregnant. Been experiencing contraction but not frequent now I have severe back ache even leg cramps plus a headache and pelvic area feels like cracking. I had a thick white mucus discharge yesterday morning. I just talked to my OB and advise me to monitor baby's movement and visit her on July 21 which I will be exactly 35weeks. She will check me up and will give medication depending hows my cervix is doing. I hope its still close and would let me deliver at 37weeks atleast.