Coming off the pill

Hi, so I ended coming off the pill (we are now TTC) on the sugar pills and didn’t get a period like usual. When I actually stopped the pill, I still didn’t bleed. I’ve taken a couple of pregnancy tests and they are coming back negative. Last time I stopped the pill, I bled pretty much straight away and got pregnant straight after that. So I’m a little lost on what’s going on with my body here and don’t wanna waste my doctors time unless there is reason for concern. Would love if anyone who’s been through this could share some insight. Thanks all 😊