My menstrual cycle is 24, 25, 26, 27, 28 & 30 days long but I don't miss a month. It is hard to know when I am ovulating. Is my cycle normal?

Probably normal . one regularity of menstrual cycle is its irregularity. THIS is probably normal. However Potential causes could be low thyroid and female hormonal imbalance. These can be checked easily by your PCP OR GYNECOLOGIST .