Implantation cramps/bleeding

Laura

Hello I need advise. I had AI done last weekend and im at 5 DPO. Ive been cramping for the past 3 days and i just went to the bathroom and had light pinkish reddish spotting. My period is not due until april 22nd. In my 32 years since my first period (now 42) i never had cramps and never early periods... am i freaking out? Can i have a blood test say tomorrow ? Ik a urine test os too early...