Interesting....

I notice have a pattern in my cycle. After every two cycles its 27 days other than that my cycle is like 30-39 days. And I didn't get my cycle on my 27 day length..... Should I be nervous or just wait and see for my period? I really hope this month is ny month I had a dream I got a positive test, but I don't want it to just be a dream. I already have surprise gift for my bf if I find out.