Confused..

Jerrin • Jerrin. 24. Have an amazing husband named Lance. I have a 4yr old, Avery. And Lance has a 6yr old, Roxanne. Ttc #2
12-13 dpo. Woke up today with creamy cm that was tinged with blood. I had what seemed to be AF like cramps but they've subsided. Boobs aren't sore but I keep getting a burning feeling in nipples and pinching back pain. Did a q tip test and it seems like the blood is going away. Not sure if I should buy a test or tampons.