Ttc 2nd child

Erin.
We're just starting to try to conceive our second child , our first is 10 months old. My hubby works out of town so it makes it harder to time when he is home to when I ovulate. 
I'm still breast feeding but now that my daughter eats a lot of solids, it's mainly at nap times and during the night only. I've had two periods now and I'm due to ovulate next week.. Just wondering if anyone has gotten pregnant while breast feeding ? And is it dangerous to breast feed while in your first trimester ? 
Thanks !