Will be 30 this year, have missed my period for 10 days, have been having period like cramps for the past week but no periods, last 3 days i spotted light brownish discharge like thing, now for the last 2 days ( yesterday and today) been having really bad stomach cramps and lower back pain , took urine test on 14th ( 8 days late) and tested negative. Could i be pregnant? Kindly help