Spotting after period us this normal?

Tiffany • Im 26 husband and I are trying for baby #4. Any advice or suggestions would be apppreciated. Thanks in advance.
I just got off my cycle earlier this week. My hubby and I had sexual intercourse during my cycle. My period has been over and I just started spotting, I've never had this happen and now I'm scared. Is this normal? Do I need to see a doctor?