Missed period, negative test.

My husband and I have been trying to get pregnant for 6 months, no luck. About 2 months ago i got orders to deploy this january, so we decided we wouldnt "try" any longer until i got back. Im not on any type of bith control.

My periods are very regular, i usually start between the 15th and 18th of every month. But this month, its late. Its the 23rd and nothing. No cramps or anything.

Im not under anymore stress than usual, even in BMT i still had regular periods and thats horrible stress. Im healthy, work out 4 to 5 times a week, great relationship with my husband at home, so im not seeing stress as a factor.

I took one test on monday afternoon (the 20th) it was negative, then one test in the morning on the 22nd, and negative. Both times my urine was very light because i try to stay very hydrated especially in this Arizona heat.

Is there a chance I could be pregnant?