Can excessive cleaning harm my teeth? i brush for 2 min. i use mouth wash and floss before i go to bed? is it fine? thank you

Yes: Yes, you can over clean and harm your teeth, but you are not. Your are fine, provided you are using a soft toothbrush.

Yes, but : It sounds like you have great habits. It is safe to brush your teeth several times a day. Always use a soft toothbrush and be careful that you are not scrubbing your teeth too hard.Excessive force while brushing can damage your teeth, so remember to use a gentle motion.