I don't know but when I sneeze nothing really happens (I've only gotten a bloody nose once) Although the only important thing is if you haven't gotten your period in a month (or more then a month) then you should check with your doctor.
What if you have your period twice in one month? That happened to me once
two times in a month???? IDK but thats concerning!!!!
I think you should see a doctor if u have it twice in a month, It's supposed to be once !!