Symptoms for pregnancy or periods?? Confused :(

How long should i wait before i test for pregnaNcy ??

I have a very irregular cyccle of 50 days .. i was suppose to get my periods today but i dont see it coming anywhr soon, though i m having all symptoms like cramping,sore breast , back ache and legs paining.

I m confused can it b sign of pregnancy or periods.

When should i check to get accurate results ??