I went to the clinic and they did to pregnancy test they were positive. I went to the dollar store and bought one and it was neggitive am I pregnant?

Possibly. Different pregnancy tests may have different sensitivities to the level of pregnancy hormone. Of course, false positives are also possible. The best way is a blood test to look at the actual level. Otherwise, you can repeat the test in a week. Discuss this with your clinic doctor. Good luck!