COULD I BE PREGNANT?!?

My boyfriend and i had sex the other night, and the condom broke! I went and did research and found out my cycle length and when I ovaulate, and all the numbers are seeming to add up to possibly being pregnant! I found a website that has where you put in your ovualting time and your cylce lenght, and it shows that I'm mre than likely pregnant, but i still want a FOR SURE answer. I've looked up alll the symptoms also, though i can't take a test till the end of this month. 3 days later i felt real light headed, had a bad headache, and felt like i was going to puke! I've had a little bit of spotting, but it just lasted a day or so, and it was VERY LIGHT. I've also had a little bit of discharge down there and its real sore. My stomach feels like its cramping, but at the same time it doesn't. Since then I've felt very sore and tired, and I can't really sleep because of it. I'm also like losing my appetite, as in I haven't felt very hungry the past few days. Saturday will make a week since the condom broke. Can ANYONE help me to tell if I'm pregnant or not?!?! It will be GREATLY APRECIATED!!!!