9 and a half weeks pregnant, mild cramping and decrease breast tenderness, i had a miscarriage 5 months ago at 9.5 weeks should i be concerned or am i just over reacting ?

Your concern is understandable, however, what you are experiencing can be perfectly normal. Many women, who have had a previous miscarriage, or a few, will breathe a sigh of relief once they get passed the stage they were at when the miscarriage occurred.
Unless there was a definite reason found to cause the previous loss, and it was something that might cause you to be more prone to miscarriages, there is no reason to believe you will have the same situation.

Wishing you a smooth pregnancy!