A common error made by many new and/or amateur card counters is that they think they have to justify every action they make, even in cases where someone else does not comment on the play. This isn't limited to playing decisions, and probably occurs more frequently when changing bet sizes. Ploppies don't need to justify their actions, and it's a pretty horrible tell when you feel the need to justify your actions while at the table.
When you do something you think is unusual, just don't say anything, and there's a pretty good chance nobody else will even notice. If someone does say something, either shrug it off, or say as little as possible.