I took 3 pregnancy tests- 3 days apart and they're all negative... Can I still be pregnant? And I did use protection after 10 seconds without protection
to find out if your pregnant take a pregnancy test 2-3 weeks after you had sex (any sooner and the results won’t be accurate) in the morning with your first pee is the best time and take it when your period is due alternatively, see a doctor for a blood test this will both let you find out quicker and give you more accurate results
If you took all three tests at the right time (like a couple of days before you should start your period or if you are late) and they all came out negative, you got lucky and you're probably not pregnant. From now on use protection every time, the ENTIRE time.