No, it is most unlikely that this has caused you or your baby any harm. But it's sensible to be careful about such exposures, especially if you're pregnant or have small children in the home. You're right to be concerned about mixing chemicals - this can often result in more toxic fumes. Particularly, never mix chlorine bleach with products containing ammonia.

I believe that it's good idea in general to avoid using chemical products as much as possible, and then only according to the instructions, using gloves and with good ventilation and hand-washing afterwards. If you have a household job to do that requires chemicals, rather ask someone who isn't pregnant to do it for you, or put it off - within reason! - until after your pregnancy.