Week 6- Can you feel it?

People keep asking me this week (family that we've told) if I've started to feel pregnant yet.  I have not noticed a difference.  I rode my bike and ran 2 miles.  I wanted to see what my heart-rate was when I ran.  It's not good.  It was like 160-170bpm.  I know runners are okay to keep running while pregnant, but I'm no runner.  So I've decided to stick to brisk walking and hiking, no more running for me. Biking is still fine, I can monitor that really well on my bike trainer.