Plan B-feeling worried


So it has been two months since I’ve seen my period. I took a plan b back in April and never saw my period. I was expected to get it around may 10 but never got it. I called my ob gyn office last month and they recommended to do a blood test just to make sure I’m not pregnant. And it came back negative. I’m still paranoid because I haven’t gotten my period yet. I’ve taken multiple pregnancy test and they all came back negative. Scared shitless here! Any thoughts?