Honey I can't tell you if you're pregnant or not but I do suggest using protection if you don't wish to be
Well, another pregnancy is certainly possible. If it's been two weeks since your last unprotected sexual encounter, then you should be able to try another pregnancy test. Use first morning urine and a sensitive test like First Response.
The other possibility is that that was your period and it was just unusually light. After terminating a pregnancy, your hormones can take a bit of time to adjust, and it's not uncommon to have heavier then or lighter then normal cycles. Also do not be surprised if they are irregular for a bit. You can also schedule a follow up with your Dr. A blood test will tell you for certain what is happening. And honey, be careful and try to make sure to always remember to use birth control. You don't want to go through that again. All the best to you.