8dpo too early for symptoms?

I am 8dpo but starting to feel so sick. Today I became nauseous, and I've had mild cramping the last few days. I'm trying not to read into my symptoms too much and I promised myself I wouldn't test this early but am I crazy?? Did anyone else feel symptoms this early? I bought some cheap tests today and I may do one tomorrow just to see.. my brain tells me this is all in my head but my body is screaming that is different. Eeek hope this is it!