Thanks Denise!
This morning, I saturated Abby's coat in conditioner and then combed her through. Afterwards, I rinsed her and then combed her again and blowed her dry. I can't find anymore tangles. Hopefully that is the end of that...or at least for now. I think my problem was, as someone posted above, not brushing her through before bathing her and the tangles were made worse that way.
I do so appreciate everyone's suggestions. I know they will come in handy in the future as well.