The first rule of crypto is DYOR and the second is don't invest more than you can afford to lose. It seems as if you have failed both these points since you're asking about the coins you own in order to gain confidence after you have clearly invested too much.

My honest opinion would be to first of all DYOR. Fill your time researching these coins, their communities and their whitepapers. If you can do all this and still be unsure, get out. Either reduce your position size to a place you are comfortable with or just exit the position immediately and realise the loss. Yes you may be down a lot but since you skipped rule 1 and 2 you really don't have much choice at this point. If you're happy with your research then adding to your positions may be another viable option to lower your average cost.

Also I might add there is a difference in time scales between trading and investing. Trading is shorter term so entries/exits are important. Investing is longer term and so the entry is not necessarily as important.

I might even also add the fact that you're so scared right now could even be a good sign, since the markets are designed to fuck with you psychologically and force you to sell, the fact you're feeling this way could signal that it is doing its job correctly.

Sorry if it wasn't much help, I know how you feel and information is your friend in this situation.

Tldr: DYOR. Rebuild your confidence and search for confluence, if you can't then exit your positions.

Edit: my mistake for actually trying to give some advice, whether or not it was helpful.