Not feeling right all day..37 weeks preg

I'm 37 weeks pregnant and I'm huge, Iv not been feeling 100% all day, low abdominal pains, breathless, cramps in leg and foot and arm, and shivering!! Has anyone got any information for me what I should do! It's quite late now, I shall wait until tomorrow to contact midwife, which I can never get hold of. First pregnancy so all new to this :)