I got my period April 14th of last month and this month I did'nt get it for a whole month and when it came I got it 5 days late and its light pink what do you think this could mean oh yeah and I had sex unprotected for the last month?

Any time you have sex, protected or not, you can get pregnant. If you are wanting to get pregnant, it could be causing your cycles to mess up, as the stress causes it to be irregular. (or even if you are NOT wanting to be pregnant, but are worrying you are) many other factors can contribute to an irregular cycle, such as change in lifestyle, sickness,diet, stress,etc. Since you still got your periods, I doubt you are pregnant. However, if this period is shorter and lighter then usual, and you are concerned, take a test. Good luck, and if your periods continue to be irregular, you might want to consider discussing it with your doctor