What Are My Chances of Being Pregnant?

i had sex for the first time and he didnt use protection. now 41/2 weeks later my boobs are sore im peeing alot more, and im my pee there is this white slimy stuff, im more tired then usual, and i've just been feeling weird, and my period is 5 days late. ive taken two preg. test and both are negative, is it to soon to test?? what should i do?? do i have a high risk of pregnancy?