Is there a possibilty i could be pregnant

Patient: I started taking cerelle again, but after a week I forgot to take it. After 12hours I had unprotected sex. I have since had unprotected sex once again, I haven’t taken the pill since. I am now worried I may be pregnant, but my boyfriends sperm is thick and we both smoke. Could this effect the chances of me being pregnant or make it difficult to conceive when we are both ready?

Symptoms: Sensitive nipples, fatigue, cramps