Is there any way? - UPDATED

My boyfriend and I have never had sex, but we've done both manual and oral sex on each other. There is a possibility he could have had cum on his hands before fingering me, but all statistics say this would not be enough sperm to get me pregnant. This would have been about 2 and a half weeks ago. My period is six days late, and naturally, I've begun to stress. Is there any way I could somehow be pregnant?

UPDATE

I took a pregnancy test, and it was negative. Period is 9 days late now. What are the chances the test could be wrong? I just want to make sure I cover all my bases.