Could I be pregnant even though I had an abnormal lighter period after having sex? The condom broke and I'm still having many pregnacy symptoms.

Yes. You can still be pregnant, because your menstrual period was unusually different from your normal mp and you basically had unprotected sex. So just check with a home pregnancy test.
Yes. Yes you could be pregnant. Many people have some bleeding or spotting in early pregnancy. Please call your doctor and get a blood pregnancy test. If a home pregnancy test is not positive and you have abnormal bleeding or you think you could be pregnant you still need a blood test.