What is going on 😭

Yesterday (12dpo) had really light spotting, then today I thought AF was here to show her ugly face but it's not even heavy enough for a tampon (I usually have to wear a super + tampon on the first day) it's on and off light red/ brown bleeding...I am having cramps but it feels more in the pelvic area and not so much like AF cramps...I'm beyond confused what's going on right now ....I don't remember what it was like from my son...I've tested strong negatives I'm currently 13dpo and AF isn't due for 2-3 days and I typically run a 32 cd

Any insight is appreciated