Delayed period. Suffer from any disease.

My period is late by 10 days. I'm a virgin. Usually my periods are on time. But first time it's are late. I had a vacation right after my last period and since then I also have a change in my morning routine. I have started getting up early in the morning by like 2 hrs. Also though not regularly but I have also started indulging in workout routine in the morning like full body workout, flat tummy workout or yoga (any one of these in a day). I have also started sneezing a lot during mornings or evenings. I don't have a job right now n I stay at home. I don't use any type of medicine. I'm not into alcohol or cigarettes. I might have had a weight change but not to much may be just a kg. I'm healthy and don't suffer from any disease.