its so hard to calulate wen u wud b fertile wen having irreguler periods, i have them myself not nice!! the only way u will no wen ur ovulating is to cheack ur mucuas and if iys like egg ehites ,and stringy then they say thats wen ur most fertile!! thst the only way i know wen im ovulatign!! iv only just staryed getting regulaer periods due being put on metformin!! good luck x
try using the **********.com ovulation calculator. Have you talked to your OB yet? I have a close friend who's cycles were irregular, lasting anywhere form 22-48 days. She used this calculator to help her and stress was an issue as well, so she looked in to ways to reduce her stress.