Dont worry,
""""""when setting reverse power to twist and or bend the blades forward.""""""
I'm not sure what you mean by this statement. When reverse is selected, the blocker doors deploy and fan flow is directed through the cascade assemblies and outward forward of the fan cowls which have been driven aft by the Power Drive Unit. As you pull up on the piggy-back levers, you simply increase engine speed and airflow; this is not like reverse pitch.
Ice coming off the wing, would bend the blades backward if any; not enough speed and energy to cause this damage.
You mentioned you had de-icing performed before take-off, but the crews are told to stay away from the fans (and the T2 sensor); therefore it is possible to have had ice formation aft of the fan blades; if a piece of ice flew aft, it hit the low pressure compressor blades, it/they got fired back forward with a vengeance, causing your dents and bends.
Have a good look at your compressor blades for nicks...
You also mentioned selecting anti-ice on before take-off, but the blades do not get de-iced by bleed air, only the inlet cowls do.
If you have to be outside during bad weather conditions, you may want to install your engine cover, until ready to start, otherwise you should climb on the wing and look behind the fan for any accumulation...
Someone was asking how the wings are de-iced: the wings by the 10th stage and the cowls by the 14th stage.
Last, have a good look between the fan and the l.p. compressor for any missing hardware...you never know.