SPOTTING at 5 weeks?!?!?!!!

Hey ladies I found out on dec 15 that I was pregnant I am currently 4 weeks 5 days. The only symptoms iv had are fatigue some cravings and light cramping but today when I went to the bathroom and wiped it was areally light pink almost to the point where you might not notice but I did. Is this ok is this normal?! I'm a FTM so I don't really know what to expect I just don't want to have a misscarriage it took us a year for this moment... thank you all in advance!