No Af at all

AF has been irregular since the beginning of this year entering Jan. 2014 didn't get AF until Dec. 30 - Jan. 5 before that AF was always 20-25 of each month. She didn't return until Feb. 11 -16 now it's march 30 no show of AF tested 5dpo and 9dpo bfn ( even though it's unsure of when I actually ovulate since cycle is so off) but haven't  tested again but been really tired having cramps and lack of appetite a lot of smells really make me sick should I test?