Hi I'm 18 years old. I got my period on July 1st ended July 7th. MY cycle is always on time. I never had any problems. About 5 days later, I had painful cramps in my lower abdominal. I had very light blood more like water. At this time i was over seas. It lasted for 2 days. July 25th It happened again. This time is lasted for 5 days. I went to the doctor he said everything was fine. Theyre obviously retarded over seas because something like that has never happened to me. They took a urine and blood test. Everything was fine. I am not on birth control and my fiance and I don't use condoms. We use the pull out method. But It's August 22nd. And i still haven't gotten my period yet. I feel very tired my appetite has increased, light cramps. Am i pregnant ??? HELP!!