I'm a little older than you, I'm 50. I've potty trained about 26 kids and I can only tell you about me. I never use pull ups. To me, it gives them permission to pee in their pants and not get wet.
Go to Kmart and buy some thick training panties. They are the only place that I know of that still sells them. Get about 6 pairs. Then make a big deal about how big your little girl is now and that she is going to wear big girl panties. Take her to the potty chair (not the toilet because some kids are scared of it) and pull down her big girl panties and sit her down. Then run the faucet so she can hear the water. If she doesn't wet, brag on her anyway for trying and go back to what you were doing. Give her some juice in a sippy cup. Wait about 30 minutes to an hour and try again.
If she wets her panties, she is going to feel it run down her legs. Say, "that's why you need to use the potty, because now you are going to get wet when you pee pee." Change her panties and try again in about an hour.
It takes a lot of patience, but she will get the hang of it.
I tried one other thing that I saw on Dr. Phil one day, when I was potty training my grandaughter. She had just turned two. I went to the store and bought a potty chair that played, "how dry I am", a baby doll that had a potty chair (I found it at Big Lots) and she had a bottle. I got balloons and a cake and I told my "Jade" that were were going to have a "Potty Party" and that her baby was the guest of honor. We had the cake on the table, the balloons blown up (Jade helped me) and we filled the babies bottle up with water. We took off her panties and sat her on the potty chair and Jade could hardly wait. She wanted so bad to sit on her potty and pee, but we let the doll go first. She would drink water from her bottle and sit on her potty and pee and then we'd all clap and act silly. Jade loved it. Then we put big girl panties on her (Jade) and she sat on her potty (In the living room where the party was) and she peed in her potty.) We all clapped and made a big deal out of it. She never wore diapers again (except at bedtime) and she learned in one day. You might want to try it.
My second grandbaby turned two in April. We tried the potty party and the same things we did with Jade and she isn't ready yet. She would go sometimes, but she thinks that she is only to use the potty when she has on panties. The other day she went into the bedroom and put on a pair of her big sisters panties and then she went to her potty chair and she pulled them down and she went. We clapped and told her how big she was. A little later she wet her panties. Her name is Cheyenne.
I tell you this because Cheyenne doesn't talk much. She can say severl words but she doesn't talk much. She is really smart and just like her Mama was.
My first child, Johnny, was talking sentences at 18 months old. People would ask him how old he was, and he'd say, "I'll be two in July". They'd look so strange and ask me how old he was and I'd tell them he would be two in July. Then came Christie. She started talking a little before two and I babysat kids and one little girl wouldn't talk. She was the same age as Christie. Anyway, Christie shut up and didn't talk until she was well over two years old. Then you couldn't shut her up. Johnny is the quiet one and Christie never hushes to this day.
If your little girl is developing and talking a little, don't worry. She knows she has other ways of getting you to give her what she wants. The voice will come when she is ready. By the way, Christie was over two when I got her potty trained, so don't worry.
I would definatly stop using the pull ups. To me, it gives them permission to keep using their panties and not use the toilet.
Hope this helps.
K.