Since yesterday lunch time I have had a continuous dull ache in my back and stomach like period pain. The occasional sharp pain in stomach and tightening in vagina. I went to the hospital today and they checked me out and said it is just muscular pain. I have taken codeine with paracetamol twice already today and I'm still in pain! This is my first baby so I'm new to this but it all feels a little too weird. My midwife measured me as 3 weeks ahead. Has anyone had this before and gone into labour early or am I being paranoid?