Hi I haven't had a period since may the 7th here it is July the 17th. I have took four pg test and they say negative but my period isn't caeme and it has never been over one month late but I don't have no sore breast does any one know what this is?

It could be a number of possibilities. Anything different happen in the last few months? Any new medications? Best to make an appointment with your doctor for some blood work to check various hormone levels. They will also check for pregnancy again.