kinda need help

Shayla

so today i put a pad in before work and I went to the bathroom and it had a light brown spots on the pad and I got home tooken a shower and a put pad on but I went to the bathroom before I lay down and it was dark brown but not to fill the whole pad and I was wondering if a sign of pregnancy or time to take a test but I know it not my period cause I bleed really heavy in the beginning of my period