i think i could be pregnant, but im not sure

ive had sex with my boyfriend 2 weeks ago now and i have come on late by a about a week late which im never late. i came on well i think i did it was for 2 days but light not heavey. after the two days i had some spotting. but before my period i was i feeling funny ie, faint, i have had some mild headaches which is causing me to feel faint and now im getting cervical discharge nearly everyday.