Achy Joint's! Anyone else?

[trying2beehopeful]

I just received my BFP yesterday! I'm almost 4 weeks along with my 1st baby! The only symptoms I'm experiencing is a tight feeling in my abdomen and soreness (like I did a bunch of crunches last night), gas, and the odd one... achy joints (mostly my elbows and knees) and achy muscles.

I know it's very early but did anyone else experience achy joints and muscles this early in pregnancy?