I watched this movie before 2016 so it’s at least that old. the plot was a woman turns 30(?) and at her birthday party gets depressed and drunk because she is all alone (single).  she later finds out she’s pregnant and can’t remember who she slept with.  hilarity ensues as she goes through the different possible fathers much in the same vain as “The People I’ve Slept With.”  though if I remember correctly it turns out the father is her best friend’s son.