I strongly recommend that you take a pregnancy test now. This will help you much better than any further speculation on your fertility.
Fact is, you had high risk unprotected sex. It does not that your partner did not ejaculate inside you: before ejaculation there is pre-ejaculate, which can cause pregnancy just as well.
Also, the bleeding you experienced between now and the unprotected sex was not as you had expected it to be. While it's to be expected that your cycles are a bit erratic after stopping the pull, and bleeding can be very different from what you were used to during the pill, the fact this bleeding was light and more "spotting", does not rule out pregnancy, either.
So yes, you could be pregnant.
Not having any "symptoms" of pregnancy matters little, too. Most "symptoms" such as frequent urination, sensitive breasts or vomiting do not occur until later in pregnancy. You do have a primary sign of pregnancy though: a late period.
While the pill can influence fertility after stopping it, it's not an effect one should ever rely on. You are only protected from pregnancy while you take the pill, not after you stopped taking it.
So take a test now, yes?
Spike: Well, I'm not good and I'm okay.