lol that's what I always say to hubby, "I am so tired, the baby must be going through a growth spurt" when I was earlier in my pregnancy I would say I was tired from growing fingers or toes lol.
I too am 26 weeks 4 days and experience fatigue. My nap is my bestfriend. Luckily my dtr still naps. I think our bodies are going through alot to develop our little beans but I also blame my tiredness on chasing my 2 year old around. You can talk to your doc about it at your next appointment.
pregnancy generally will cause you to feel tired. your body's doing a lot of work, growth spurt or not. if you're lacking energy a lot it's best to have your iron levels checked just to ensure you're not anaemic. some women are prone to this in pregnancy, i'm one of them. you'd simply be put on an iron supplement if you were.