Fist off she's still pretty young by today's standards so you both are doing an awesome job.
Second off I wouldn't make it stressful for her or that will only make matters worse!
Stop with the pull ups. She may potty her pants when you are out of the house but she will quickly learn if she can feel it running down her leg. My son potty learned at 19 months but wouldn't poop on the potty. Instead he would wait until he got his trainer on to go to bed (we cloth diaper) and then poop. So problem solved he slept naked. We stayed home for about a week with him being naked the entire time (eating etc) and I'm happy to say at 3.5 he's never ONCE had an accident.
Pull-ups are an evil invention. They are just like diapers. Take her to the store and let her pick out pretty undies. When you put them on her tell her that they need to stay dry (if they are my little pony tell her she's can't get the ponies wet) or the undies will go in the trash. And follow through. If she potties in them seriously throw them away!
Also, she might be afraid of those big huge potties when you are out in public. What I did was sit on the back of the potty, spread my legs and let DS sit between me. That way the potty is not so big and I'm there to comfort him. Worked like a charm I promise!!