Non-urgent doctor appointment????

Okay so I’m 6days late and all my pregnancy tests were saying negative so I went toy doctor yesterday and got blood tests done. Anyway I got a call back today and he just got me to book an non-urgent appointment for a weeks time. What could this mean? Like I know nobody is a doctor and I shouldn’t be too worried but I am. Like I’m worried I’m just not pregnant and there is something wrong with me causing late/missed periods.

So anyway question is has anyone got a similar story and was pregnant or was there something wrong?