Waiting for BFP

Zhane
So my period was supposed to start 4/21 but it hasn't. I took a pregnancy test 4/22 but it was negative. After updating Glow, it said that it was supposed to start today. Had sex with my partner just to see if he would "knock it on" but still nothing. It's not normal for my period to be late. We believe I'm pregnant but that negative test got us straddling the fence. Advice anyone?
**UPDATE
Took another pregnancy test this morning and to me it looked like it was a positive but it's really hard to tell because how faint the line is. So I went to the clinic to see if it would be positive but it came out negative.  Blood has been drawn so we're waiting for the results on that.