tale of a 16yr old... afraid that i might get pregnant!

i am a 16 yr old and had my periods on 9th oct 2011.On 14th oct (6th day of my period)i lost my virginity.i had sex with my boyfriend.we both were very careful and used a condom(he came 2 times inside me and both the times we used a fresh condom).the first experience was painful and my boyfriend respected it.In between the intercouse,he came inside me without any protection for a brief period of time.after sex,we bought an emergency contraceptive pill i.e ipill and had a long discussion whether i should take it as it had high dose of female hormones.he rejected the idea but later at night i took i with my food.

i am aware of it's short term sideeffects i.e lower abdominal pain,swollen and tender breasts.but i am afraid that i might get pregnant.after i took the pill,i felt very dizzy.my body was aching from the intercourse(i do not exercise regularly!)and on top of that,after the pill i experienced lower back pain,pain in my hip bone and the joints near my female organ.i cannot make out if my breasts are tender but it had swollen a bit(the act during intercourse,hickies etc).i feel a slight pain in my stomach's muscle and in my ribcage.moreover,i do feel kind of nauseous but i am not hungry and do not like eating anything.i feel thirsty all the time(i do not drink water much).my trips to washroom is just about normal and my discharges are not brown.i see no signs of bleeding also.

PLEASE HELP!!!ASAP!!!AM I PREGNANT? or DO I HAVE A CHANCE TO GET PREGNANT??????