My 5 Year Old Daughter Hit The Back Of Her

My 5 year old daughter hit the back of her head on our concrete floors 6 months ago.She cried for a while but we didn't take her to the ER we just monitored her. But then again 3 weeks ago she fell and hit the side of her head on some tile floors at a hotel. Shes complained about having a headache today and about a week ago. Should I take her to the doctor?