Late period

I really need some advice. I’m TTC and I’ve been having some symptoms (change in breasts, nausea without vomiting, headaches, fatigue) etc. I had a little spotting last weekend, it lasted about 36 hours total and didn’t fill a pad. My period was due 2 days ago and I am NEVER late, I’m like clockwork. But all my tests are saying negative? I’ve taken apart digital tests (which I know you shouldn’t) but they are showing 3 lines, 2 are faint (the pregnancy and how far gone lines) and 1 strong line for the control line. Any advice on what to do, or has anybody else missed their period and eventually got a positive but a lot later in their cycle that you’d expect? I’m driving myself crazy