help me now!!!!!!!!!!? first off, i have my period between the first 7days of the month. on april, i finished on the 8th and then i started taking the pill on the 10th. i usually take the pill every morning (between 0900h-1000h) until i travelled and lost track of time. basically, i took the pill on thursday the 13th at 0930h and friday the 14th at 1900h. Between those hours, we had sex. since yesterday, my breasts are really sensitve and my nipples are somewhat painful. i was also sleeping all day because of a headache. Is it possible that i ovulate and get pregnant in that situation? Is it possible that i am experiencing pregnancy symptoms at this early stage? How can i tell if i am pregnant this early? if so, i had been taking pills in the last 5days, will that affect the fetus? should i stop taking pills?
NOTES:
I smoke occasionally
I hardly/ almost never have breast pains. 
I am expecting my period in about 12-14days

Summarized question: What are early symptoms of pregnancy?