Nipples

So my cycle is irregular post ten yrs on the pill, so tho Glow says today is my last fertile day, I may actually have ovulated two weeks ago. Or I may not have yet (accord to another app)... to be safe my husband and I are trying often. Just today my nipples which are normally small and pink, feel sore and over exaggeratedly large for me and seem darker. Anyone had this as a first and only very early symptom? It's a weird one.