Almost 5 weeks and back pain

Megan • Vegan Celiac 🍴Baby Girls 7-2018, 4-2020 ❤️

So I got a positive pregnancy test last week. More recently I've noticed that my abdominal and back muscles are sore. Like they would feel after doing 100 push-ups or crunches. No cramps. Just the muscles themselves are really sore especially when I turn a certain way or bend over. Is this normal?