Well, you can get pregnant as soon as two weeks after an abortion, so it is possible that you've become pregnant again. However it's worth noting that what pregnancy tests look for is a hormone that your body creates during pregnancy. It doesn't just disappear after an abortion, so for as many as 60 days after you may still have a positive test. You may want to consider getting a blood test, since it can measure more specific levels. If you know the date of your abortion you should be able to see if the hormone levels are decreasing as they should be.
What the heck if you had sex again! Then the answer is yes what the heck. Please be more responsible stop using abortion as birth control and use some type of birth control like condoms or pills if you don't want to have a baby,