Not sure if I'm Pregnant or not

            You're probably pregnant if you took 3 tests and they all came back positive. Now there is the negative fourth test. This could be a false negative, or you could have had a miscarriage. Either way, if I were you I would go see your gynecologist as soon as possible. If you've had a miscarriage then that could result in an infection so you will wanna get that checked out. You can never be too safe when it comes to stuff like this. Also, if you have any symptoms such as tenderness of the breasts, darkening of the areolas, or minor to moderate cramping, then you're probably pregnant. I would highly recommend you seek medical attention. I wish you the best of luck and I hope everything works out in your favor. I hope I helped! And Good luck! :-)