You are playing 10NL with only $50?

Stay at 5NL and grind up to $150-200 and then swings like this won't kill your bank roll. We all have leaks in our games, so if you keep posting hands you will be able to fix them and begin beating 10NL.

How many tables are you playing at once? You said you were 4 tabling 5NL. Maybe cut down to 1 or 2 tables, work on getting reads and putting your opponents on hands and then you can slowly add tables.