Missed

I’ve not had my period for 11 weeks now and I’m extremely concerned that there’s something wrong with me as I was on a mini pill but stopped about a week ago to see if my period would come back and it hasn’t yet and I’ve taken multiple pregnancy tests as I am sexually active but they’ve all come back negative. What should I do now? I’ve got an appointment with my GP on Thursday but I’m so worried I can’t wait that long. I’m thinking of having a diabetes test done as it is very common in my family in both types on both my mum and my dad’s sides and I was thinking maybe as I’ve been having some symptoms for diabetes maybe I have that and it’s affecting my cycle - anyone have any ideas please let me know because I’m extremely anxious.