Does this sound like a chemical pregnancy?

I had unprotected sex, I never tested positive but I didn’t get any of my normal PMS. I didn’t cramp, I wasn’t moody, I didn’t have stomach aches. I was just very fatigued and craved specific foods, especially sweets. When my period did come, I spotted for 3 days prior with dark brown blood. I never, ever spot. Then I had an EXTREMELY heavy flow. I passed 3 medium sized clots over 2 days and was filling a super tampon within an hour. I bled through my tampons and pads within 45 min to an hour, even when I doubled up. My period lasted longer than usual, 6 full days instead of 4/5 light days. Then I spotted for 2 more full days. I took a test today and had a very very very faint positive. I didn’t start cramping until today, very light cramps with white discharge. I haven’t had unprotected sex since Oct 22. Could this be a chemical pregnancy?