Toddler naps/sleep

My two year old has been pretty great with consistent naps and bedtime. We have our routines down and she’s never really fought us. The past week has been awful, though. She is screaming at nap time and physically fighting us from putting her in her bed, but she will sleep 2 hours, so I feel like she still needs it. We put her down between 1:30-2pm. Then when it’s time to go to sleep, she puts a whole production on and it’s legit exhausting for my husband and I. We usually bring her upstairs for bed at 7:30 and by the time teeth are brushed, a book is read and we sing her 58 nursery rhymes (🙄), it’s 8:00. Then she usually sings, tossed and turns for another 20-30 minutes. She’s up between 6:30-7am. I’m 30 weeks pregnant so by the time she’s down I can barely keep my eyes opened. What should we do?? Should her naps be earlier? Should I not let her nap for 2 hours? Is this a normal regression?