Thanks for the query.
The possibility of pregnancy
is less in your case.
-There was no ejaculation.
-You were on birth control pills.
While being on contraceptive
pills, some amount of irregularity in menstrual cycles is common.
Sometimes intermenstrual spotting can be seen and some women may have amenorrhea
during the intake of pills.
So, to come to one conclusion, better to go for pregnancy test once.
Compared with blood test
for pregnancy, urine test is cheaper.
So you can try for that.
If the test comes negative, no need to worry. You can continue with your pills.