What is going with my body...

Just got married last Saturday my husband and I had sex on Sunday and he did not pull out. My period came Thursday. It is a medium to light cycle. No cramps, no diarrhea, no gas. I'm extremely tired and my sense of smell is crazy right now. Normally my cycles are hell. Should I just chalk this up as a good period or do I need to take a pregnancy test in the near future?