My period used to be slightly irregular, but since about february of this year, it's been almost like clockwork. As of today, my period is 22 days late. Over the past month or two, I've had some stress, but thats normal for me, and has never caused a late period. I've taken 3 first response home tests, when i was 5 days late, then 11 days, then 21..and all of them have been negative. Theres been a few days where I've had some spotting where its clear discharge with some red mixed into it. I've been slightly emotional, and nauseous on occasion. Could I still be pregnant even if the tests said negative? I'm way too young to be having a baby, and I can't really go to the doctor to check without my parents knowing. Someone please give me advice ASAP, this is driving me crazy!!!!