Spotting after intercourse?/

Jessica • My husband and I have a 4 year old daughter and a 2 year old son who joined the angles this year. This is baby #3 even with our loss we can't wait to meet baby E
I'm 4 weeks a 3 days and after the deed I went to pee and when I wiped there was some light pink blood on the tissue. It stopped there was nothing else after...should I be worried?!