Havent had a period for months...

Sydney

9 months to be exact, since March 2018. Been to multiple doctors, had 3 ultrasounds and 2 sets of bloodwork done. No one knew why. On New Years <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> yesterday I got my period!! Should I still be worried?