I did do alot of killings with these 3 guns before going back to doing my ultimate assignments on team deathmatch servers but all my kills were legitely done I wouldn't do trade kills

Hi. I been playing bf4 for a good 3 months. It's my favorite online game. I have been playing it every night without any problems. Today I started getting kicked out multiple servers for no reasons. One of them saying I am banned from bf4db for suspicious stats. Is it for hacks? If that's so, I do not have any hacks at all of any kind on my computer. I would really like to know what is going on cause I have always been a legit anti cheating guy in any games.