Could this be a chemical or ectopic?

Caitlin

I’m 9/10 dpo just a guesstimate and yesterday morning I got a faint positive on a frer. It was faint but definitely there and pink! I took another later in the day and it was negative. Then this morning I took another frer and it was also a faint positive but lighter than yesterdays however I took another just now same as I did yesterday and unlike yesterday it was also positive but still super faint. It looked darker than this mornings tho. Anyone experience something similar and end up being pregnant? Could it be a chemical or ectopic or maybe I’m just really early and the hcg isn’t strong enough yet? My urine could have been diluted yesterday afternoon and the fact that I got a positive this afternoon makes me think that’s what happened. I also know it takes hcg 48 hours to double. I’m just confused with these back and forth results. I do plan to keep testing to see if it gets darker.