Hallow Dear, 
Since you are no more on the birth control pills now, you are no more having any contraceptive protection. 
Pull out technique is not a safe and reliable technique for 
contraception. In this method, the penis is pulled out of vagina before the ejaculation takes place. However, before ejaculation, pre-seminal or pre-ejaculatory secretions (precum) are deposited in the vagina unknowingly. Precum does contain some sperms which are capable of impregnating a woman. 
Now that you have missed your period, please get your 
pregnancy test done on overnight morning first urine sample a week after the missed period; earlier, the test may report false negative. Alternatively, you may perform 
Beta hCG test on the blood. This will help you detect your pregnancy status. 
If you are not pregnant, you may take some progestational preparation like 
Deviry for 5 days (with an advice of a Gynaecologist). Then within 4-7 days, you should get withdrawal bleeding. However, if you are pregnant, you may opt for medical termination of pregnancy. 
Since you are regularly engaged in sexual activity and do not want to continue with 
oral contraceptive pills, please adopt some other reliable contraceptive method like condom or 
intrauterine device. 
I hope this clarifies the issue. 
Dr. Nishikant Shrotri