31 days and counting

Where do I start? Ok, so I am normally pretty regular for my periods and by regular I mean I never miss a period even if they are a little late or early but they always last 7 days well in July I was 12 days late before I started and it was light didn't have any cramps which is super weird cause I always cramp. But it only last 5 days. So fast forward to August I was supposed to start the 27th and didn't I'm currently 31 days late and have just missed September's period too took tests all negative I'm bloated feel wet all the time no signs of a period have had some acne on my chin on and off since I've been late, I set up an appointment with my OBGYN and she can't see me until oct. 2nd so I'm just counting down the days so I can see what is going on with me I just knew I'd start at some point but I guess not I don't feel like anything is wrong but clearly something is! So nervous to find out!