Thanks el condor.
We are somewhat clear now that your notebook has two hard drives.
You dropped your notebook and when it did not work,you disassembled one hard drive. ( Once you have opened the HDD, it is gone.)
Now irrespective of what the other drive contains, will it be OK? I very much doubt it. But may be you are lucky and it is intact. ( You may perhaps be advised to put it in an HDD enclosure and check whether it is OK and if, to find what it contains.)
Since I am not familiar with the dual drive HP envy, I may not be able to help any further.
Please post the exact model number of your HP Envy so that someone who is familiar with that machine can take over and help you. I retire
( Personally I would prefer that you return the machine to HP for repairs. Of course they will charge you since this damage will not be covered by the warranty but they may perhaps be better equipped to refurbish it and return it to near-original condition. We reallly do not know what other components could have been impacted by the shock and it may prove to be a tough exercise to do a repair with distant guiding.)