Am i pregnant? help me out with your knowledge and maybe a little advice!?

Well after one mistaken thought of pregnancy that turned out to be a negative my boyfriend and I decided to stop wearing protection. this lasted the entire month of march. He is now rethinking and pulling out lol but i think his thoughts may be a little too late. my last period was feb 24 2010. i did not have one for march at all nor have i had one yet. i've had two yeast infections ( but those are common when i'm put on antibiotics). i'm wondering if you think i'm pregnant? if so i'd be about 6 weeks and 4 days but i dont really want to take a test yet i fear the results either way. asking first. also i recently caught bronchitis. could this effect the baby? and if so what should i do? i talked to the doctor before she prescribed my meds but it still comcerns me. thank you for all your answers and hopefully some advice