So, I got my bfp!

I need some advice -

I had a period from July 15th - 19th, then skipped august (all with negative tests) and then had (what I thought was) a period from september 27th - October 1st, then got my bfp on October 6th.

Obviously this couldn’t have been a proper period as I wouldn’t have even had enough time to ovulate, let alone implant in 5 days.

The clear blue digital says I conceived 2-3 weeks ago, putting me at 4-5 weeks. How accurate are these tests? Is it possible I just ovulated suuuuper late into my july cycle?

I have a doctors appointment booked but I’m so impatient haha!