Aching legs and bum - 21 weeks

[Dandeeli]

I’m 21 weeks today. I’m away for work this week which involves long days (but mainly sat down) and evenings have been taken up with dinners etc 😴😴😴😴😴
Exhausted tonight so have ducked out of this evenings festivities and having a bath which may hopefully help.
This morning I woke up with very achy legs and bum. Not painful but the sensation you get after a very strenuous workout the day before.
Is this normal? This is my first pregnancy so no idea! I’m not overweight but do feel like bump has expanded this week! Thanks in advance

I sometimes felt like this, I figured it was almost a stiffness from the night time and staying in positions when sleeping? It wasn't bad and would ease when I started walking. Didn't have SPD or anything like that!