E.T.
Her night time schedule looks good for a three month old. I wish there was something we could all suggest, but waking only two times a night at that age is good.
As for the reflux - my advice is don't have her nap or sleep in her carseat. Put her in her crib or a swing with the head elevated. The car seat's angle isn't enough for reflux. Also, you could look into a reflux wedge to help in the crib - they're designed to hold the baby at the proper angle while they sleep. We liked the one from Tucker Sling.
Pediatric chiropractors can work wonders on babies with reflux. They don't do a full chiropractic workup like they'd do on an adult - it's more like massage, but tons of people say it helped with their babies reflux.
Be careful if you do decide to sleep train when she's older. Crying makes the reflux so much worse, so it may backfire because she'll be spitting up from crying. We didn't end up sleep training with my daughter who has severe reflux, and she slept through at about 7 months. Hang in there!