11 days late?

I took 4 test. 20 bucks wasted!!!! i bought the digital clear blue with the countdown timer thought it was legit. but than the first test I didn't was invalid :) it did the timer but stopped and was blank I at least wanted pregnant or not pregnant bit didn't tell me neither so it was a bad test I'm not sure took the second one last night and it had a book error which meant that it couldn't read since I didn't peed too little. than I went back to store got the first response. I took the the test last night around 11pm before bed but it was negative which I had a second one to see if it's accurate cuz I didn't realize drinking lots of water dilutes it and could be a false negative woke up this morning and I felt sick like Soo nauseous but i thought should I do the last test cuz I didn't know if I should or not cuz the fact that I spent 10 bucks for 2 test that didn't work and said let's hope this at least works to give me a positive or a negative. and the result was neither postive or negative! :) one test out of the 4 worked . 20 bucks gone down the drain? so whats next Im not spending another 10 bucks for more invalids it's gets me irritated so fast and I'm like I don't even know what's irritating me i kind of want to know if it's postive or negative cuz I'm only 18 I'm not ready to have a baby . :)