Help? Advice?

So I am now on cycle day 44 and am unsure what to do! I took a pregnancy test yesterday and it was negative. I am confused because I have two different apps that say I start at different times, but according to both of them I am late. I have very irregular cycles, but never one that has been this long. I don't feel pregnant and I don't feel like my period is about to start. The only symptom I really have now is sore nipples. Should I contact my doctor or wait it out? Advice and opinions greatly appreciated!