Period over 2 months late!!

K

I’m over 2 months late on my period and tests are all coming back negative, my last period was 3 days long. We are currently in the process of buying our first house so I feel it’s stress related. I’ve googled and it says leave it 3 months until seeing a doctor. Getting so moody and easily annoyed now at everything, which is both a pregnancy and period symptom....

If I was pregnant, wouldn’t it come up on a test by now?

Let me know what you guys think