Wacky schedule

Since my husband and I have been ttc baby #1, I've been tracking my period days. First time it was 39 days and second and third time it's been 35 days. I'm at 35 days today and no signs of period. Is anyone else longer period times like this? Obviously it's super hard and frustrating to plan ovulation time then. I have two ovulation apps on my phone and they have ovulation times a whole week apart but periods being 3 days apart. Help!