Well, first of all congratulations on your weight loss! That is a huge accomplishment.
I had tried to lose weight before TTC #1 also, I think I lost about 10lbs and then we got pregnant.
I've heard that being overweight makes it harder to conceive and can make your pregnancy more difficult, but in & of itself is not a reason to avoid getting pregnant.
So... you've only been at it a month. It will happen!
It took us 12 months this time around!