IM SCAREDDD

Hello guys I had sex on the 24th of January. Took a plan b the same night , I believe that was 4 days before my ovulation. A couple days after I blended for a day lightly very red and dark red blood. Then it stopped. 2 days after I spotted light pink. Could that have been implantation ?? Chances of pregnancy ? Sorry I’m new to this and now I’m having stomach pain every other day all over my stomach 😫😫