Yes you should get the spotting checked out by your doctor. Spotting is not considered "normal" during pregnancy although it can occur for various reasons. It can be from you sensitive cervix after intercourse or a strenuous day or from something more serious. I've experienced it with this pregnancy(spotting and bleeding) and was relieved after going to the doctor and "knew" baby was fine. I also got an explanation which eased my mind. I believe it's always better to be safe than sorry. The fact that you're not cramping is good but check it out anyway. Keep us posted and best wishes.