LO sleep trouble

My girl is almost 2 months old (on Nov. 13). She has gone from napping from 2-3 hours each turn to 15-30 minutes! Sometimes no nap at all! I am running on empty. Barely have time to use the restroom before she wakes up and starts screaming for me to come pick her up. Sleep at night is more important than day naps, and you would think that she would be sleeping through the night with how little she sleeps during the day. The longest she goes is 5-6 hours and that only happens once or twice a week if I’m lucky. Are there any other mammas out there in this situation? How do you handle it? I’m so exhausted! Her 2 month appointment is Nov. 18 and we will be discussing this with our pediatrician.