> Is it ok to do this ?

Yes

> Because when I power the board, the 7805 gets very hot quickly
> and I had to pull it off (there is no power consumption as I haven't
> planted all the IC's yet)

Something is wrong. There is power consumption, possibly a short
or pins swapped. Have you double-checked the 7805 pin-out and
then checked it again ? How about the voltage out from the 7805 ?
Sure there's less than 30V on the input to the 7805 ? Looked for
solder bridges or a problem with the wiringtracks ? It'll be something
simple

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