I’ll have 2 babies born in the same year😳

I just had my first child February 08,2019 . My baby is only 2 months old. My period was supposed to come on the 14th of this month and still has not came on yet. I got curious and took 3 pregnancy test and all are positive. I did the <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">due date calculator</a> on google and it said my due date is approximately December 19,2019. Any other mommies had babies born 11 months apart and in the same year?