My period is 7 days late my breasts are sore and I have abdominal cramping every once in a while. I don't feel moody, emotional, or very tired though. I had intercourse last month and the entire week after I had light to moderate bleeding I have no idea why. Now my period is late and I've taken a couple pregnancy tests that are both negative. What do you think is going on?

A false negative is common at times, but again some women do just miss a period or it runs late from time to time.
Are you using the very first urnine of the morning for best test results ?
Also try again in one more week, if still negative, go see your doctor to verfiy and see if there are other issues that may be causing it.