Im 35 Weeks Pregnant And Im Not Sure If Im

im 35 weeks pregnant and im not sure if im feeling real contractions lightly I think they just started I keep feeling tummy tighten andneed to urinate while having one and pressure on my cervix and a stinging feeling every now and than on cervix also back pains but none of this feeling is consistant but its been all day long on and off.....could this be contractions or Braxton hicks I feel cramping too and my heartbeat starts racing faster im having one now...