for your next period the day it starts count that day as day one and count to 14 days. the 14th day and 2 days before that day and 2 days after that day.. which is 5 days are ovulating days... i am not sure it works for everyone but i did for me twice and worked for 2 other people when i told them about it.
i also have irregular period,i always check myself especially if i start feeling the cramp and my temp goes high,maybe when am in the toilet check for that slimy strecthy discharge,and when i saw it i made sure my husband made love to me that night and every other night till i felt it had stopped and now am prego.try it if you can
do it every other day! or atleast 3 times a week. the sperm live uo to 24-36 hours...they will be there when the package drops.