How to tell if you have a bladder infection?

Tiffany • Christian. Mother of 3. 3 living and 1 angel. 10 years together married 7.
How can I tell a bladder infection from just pregancy peeing? 
I feel like the last few days I have been going pee a lot even though not much comes out. I have had a bladder infection before but the only symptom I experienced with it was going pee a lot and pain near my bladder. But even that I'm not sure of since I have a lot of ligament pains as well. Any help! Thanks