I have been on the contraceptive pill Loestrin 20 for over a year now and some months I don't take a period at all. I spoke to my GP and she said this can happen and not to worry. I finished the last pill of the pack on Tuesday night and again I have no period - I took a test to be safe and it was negative. However last night my boyfriend and I had drunken unprotected sex. What are my chances of becoming pregnant after this? How long do I need to wait before taking another test to get accurate results? And if it turns out I am what are my options?