BF3 lag?

Sorry it took so long.

I did that and the FPS's are shown on the top right corner of the screen. 

I have to add that recently the game sometimes freezes for a sec or two (it's not constantly but it's pretty annoying).

Also I'm checking my temperatures with HWMonitor while playing (max temperatures reached):
- CPU: 54ºC
-  GPU: 70ºC
- HDD: 39ºC
- MB: 49ºC

From what I know (correct me if I'm wrong) they don't seem to be that high; lately the temperatures outside have reached 30ºC or more and I don't have air conditioner at home XD.

EDIT: There is something I forgot to tell you. When I play longer games (those that have like 1500 tickets or more) and I have been playing for like an hour or so, the delays start getting worse and sometimes it reaches a point where I get kicked out from the server. The "kicking out" process happens in a weird manner: the game window acts as if I have minimized it (apperaing a black screen followed by the shrinking of the BF3 window to the top left corner) and then it maximizes again, minimizes again and maximizes yet again just showing up a black screen and then, finally, it closes itself and in Battlelog says that I have been kicked out from the server. I check my ping regularly (average: every 5 minutes) and the ping is like 50-70. It just happened now again and the last time I checked my ping (before getting "kicked") it was 48.  
I don't actually believe I'm really being kicked out, since: there were free slots; the moment just before I was kicked I didn't write anything offensive (I didn't even use the chat during the game) or used anything prohibitted by the rules of the server...