How long does it take Clomid to get out of your body?

I didn't take any clomid this cycle;but I did take it last month.And this month I feel like I took it due to symptoms that I'm having.

For ex;this cycle I've Oed exactly on CD 16 which never happenes to me  naturally.I'm a late O'er;thats why took the clomid.Also I never used to have O pains except while on clomid.But this month I have pains as if I've took clomid.

So ,I'd like to know if clomid is still in my body from last month and still working for me.

Thnx