16 days late

Hello I'm new to this app and I wanted to share about me I'm 21 I live with boyfriend who's 26. We've been best friends prior to dating. We have our own place and we both work good jobs. We've been ttc for the past 4 months prior to that I was on the pill. But now I'm 16 days late. I've taken 2 hpts both negative one the day of my expected period and one a week later. I'm kind of loosing hope maybe I didn't ovulate last month... Idk