what's my due date?!

De
Can any of you ladies help me figure out my due date? This app says I'm currently 4 weeks 5 days, I did a clear blue digital and that say 2-3 weeks. First day of my last period was Jan 15th but that's not really anything to go by as I have PCOS and my periods are irregular, I think I ovulated quite late. Any help would appreciate! Thank you girls :-) xxx