4 days late... testing negative.

Rebecca

I am now 4 days late for my period, I only have 1 ovary and have PCOS. I've been feeling so sick and got stomach cramps. I'm currently waiting on <a href="https://glowing.com/glow-fertility-program">IVF</a> but could I be pregnant? I don't want to get my hopes up but kinda feel in limbo. I have taken a pregnancy test but says negative. when should I even take another one?