Worried in need of serious help..

Ok so I have been on the pill (cerazette) for 3 years ! .. I have been very moody and all that so I decided to come off the pill I thought there maybe too many hormones not releasing

I have been off the pill now for about 6 weeks

Glow says I should of started my period on 25th December but I haven't .. my boobs are really sore I feel sick n keep getting period like cramps

What is wrong with me '_'