So yesterday and a few minutes ago I experienced some dark brown spotting, it was very light and only showed up when I wiped. I've heard this was a sign of early pregnancy (I have also been experiencing constant fatigue, extremely tender breasts, lower back pain (unless something is wrong with my kidneys... ) and nausea) so I took a test but it was negative. My period last month was around the 22nd or so and was only about 3 days long, although I'm not sure if that matters as I have had unprotected sex since then as well.

Anyway, I woke up not too long ago due to terrible cramping, mostly in my left side where my ovary is. It only lasted maybe 20 - 30 minutes. I'm not on my period, I've never cramped before my period or had that strange dark brown spotting before. Anyone know if this is normal or what could be causing this? Could I still be pregnant and have just tested too early? Cause everything I seem to find on the internet associates these things with early pregnancy.