Thank you so much for everyone's replies and all the threads that I read on here!
I am so proud to say that Lexi is officially potty trained!
She doesn't pee in the house anymore and when she needs to go she waits by the door I usually take her out to!
Or when I want her to go at certain times, I open the door and say "Lexi, go potty" and she does it right away! I am suuuch a proud momma right now!!!
She does it on command when I'm at someone else's house or at the park, etc.
I am in the process of teaching her poochiebells now so I can know/hear that she has to potty. I am so excited! I will update on poochie bells when she achieves it.