I had weird aches and pains everywhere in the first trimester too. They were all for a short while only, a few seconds at most. I had to rest every 10 minutes when I went on a holiday at 7 weeks pregnant where I walked for a long time. Ultrasound at 9 weeks showed baby was ok and gynae said to call her if there the pain is severe or happened for too long at any one time.
If pain has been persistent for whatever reason, it is best to consult doctor. Though you are 6 weeks, it is best to check that you/baby doing okay and ensuring that you raised the mentioned concern above.
SNBMR