I'm feeling really down

My menstrual cycle is 17 days late. And every pregnancy test I've taken is negative. I don't know how much more I can take. This is breaking my heart. I thought I had a positive test 2 days ago, but after getting a negative today, I guess it was a faulty test. I just really don't know how much more I can handle. I'm terrified that I'm starting menopause early. My mom started at 29. I turn 28 next Monday. Ugh. This is fucking terrible.