I had played crota hard today and went through it just fine but i decided to do crota normal and i didnt get any of the drops and the raids reset today
-
This is normal. If you complete a hard mode raid prior to normal you will receive "double drops". If you then complete normal you will not receive drops, as you got them when you completed hard. https://www.bungie.net/en/Help/Article/12287
-
You don't get normal drops if you do hard first.