I got pregnant at the age of 17. I missed my period for 3 months, kept taking pregnancy tests and they ALL came up negative. Finally, 14 weeks along, one showed up positive. I guess I had low levels of the pregnancy hormone and the tests weren't picking it up. I was very active in sports so I just assumed I wasn't getting my period b/c of that. I know I was feeling sick. I didn't have "morning sickness" with vomiting. I just didn't feel right and I was very tired. I'm now 5 weeks pregnant and found out right away. It's totally different for me this time.