My chemicals were all because of my septum in my womb, after this one I went private, had a hysteroscopy and got diagnosed, then had an op to remove it, I was pregnant with Charlie on month 3 of clomid, I took progesterone from 3 dpo too.
If you suspect chemicals then I'd get bloods done to confirm as soon as you see a line, that's what I used to do..
I wouldn't worry too much though I'm sure you'll be fine and it will happen soon enough...
I'm gonna take clomid again when I'm ttc, I think it not only helps you OV it boosts the other hormones too, will you try it again?
Xx