It's normal! I needed naps all the time in first and 2nd trimesters. But that doesn't mean it's hopeless that something might help you feel at least some better. You might try another brand of prenatals to see if you can tolerate them now - low vitamin can sap energy. I felt a huge energy difference the days I drank a ton of water vs only normal amounts. My tests came back only slightly anemic so my doc said I didn't need to do anything, but I tried adding iron supplements and I felt so much better!
Reply to I am 7 months pregnant with my first and have been fighting extreme exhaustion.