Another 'am I Pregant?' Question!

Hi everyone, I will try and be as specific as possible so you guys can better answer my question. I think I may be pregnant, and i'll tell you why. My husband and I have two kids and don't really want any more (if another one comes, we'll be happy of course!) well, on april 8th, we had a little romantic evening and um...Did the deed. A second after we finished, my husband jumps out of bed and says 'go...Do something, the condom broke!" (i don't use birth control, it makes me sick)

now I don't keep track of my periods very well, but five days later I began spotting very lightly, it remained light, with a few tiny clots but very intense cramps for about 6 days (which is longer than my usual period). I know i'm expecting a period, but this isn't heavy at all. On top of the really bad cramping, I have had a headache, and my breasts were (and still are) very tender and seem bigger. Since the 8th, I have taken three hpts and they've all come out negative so I stopped worrying. Now this morning (26 days later) I noticed that i'm spotting a very, very little bit, so my suspicions are back up. What do you think the likelehood of my being pregnant is? I'm going to go into the doctors soon, but i'm dying for your opinion.


Thanks!
Amber...