I had a sergical abortion1/26 started birth control pill1/27 had sex with a condom2/3-2/4 the condom broke so i took planb2/5 could i be pregnant?

Not likely: With no missed pills, "perfect use", the failure rate is 0.3%->99% effective.In typical use, because taking a pill every d without ever missing is hard, about 9/100 couples will get pregnant/year. The pill becomes effective after 7 days, and starting it right after an abortion means that you will prevent the next ovulation. You've done everything right--keep taking your pills every day same time.