And in the meantime the price per share just goes down and down and every day i'm telling myself i'm gonna wait for it to go back up before i sell so i won't have a massive loss. And every day my loss gets bigger

Not blaming anyone but myself here by the way. The price just went up with every miner they bought. Till i bought shares and that day it stopped and went down.
It's just quite frustrating.
Sell now? Get those last few Bitcoins back before it drops even more? What to do?
If you don't really NEED "cash" BTC then wait until January, when our first 2nd gen ASIC will start hashing. (just assumption, but real one)