8 days late, test negative...

My husband and I have two kids, 8+2. We’ve been TTC for our third and final, this is cycle 11 that we’ve been trying. My period is 8 days late. I’ve taken a couple of clear blue digital tests, and a couple of dollar store tests, all were negative. Could it still be too early? Thinking about making an appointment to be seen by my doctor, but don’t want to over react just yet. I am having some breast tenderness and mild inconsistent pain in my lower abdomen, so I’m not sure what to think. Anyone else have this experience? It’s getting a little stressful not having any answers and not knowing what’s going on inside my own body!