Revised I am freaking?

I asked a moment ago, could I be pregnant(sorry i hate these ?'s too)? Husband had vasectomy 2 1/2 years ago, I am now 5 days late. Some of you mentioned stress, other than my 4 kids, I really don't have stress. I do however have a swollen and kinda painful lump in my . It just showed up 2 days ago. Any ideas?