CM after implantation


I'm 7-8 dpo and yesterday started getting some EWCM. Today it's thick, slightly yellow, and still stretchy like EWCM. anyone had this before and been pregnant? Or am I just symptom spotting and it's nothing. 

Also- I've had heart burn today and I've been cramping every day since O but much shaper the past couple days. With some side stitches. Headaches come and go but never super strong. No appetite. Fever in the afternoon 99.4-99.6.