It depends what level you're playing at and what your full bankroll / funding situation is.

For example, if you're playing NL 5 and your roll is $75, you could drop down to NL 2. However, if you're willing to add say $50 that's currently in your e-wallet , bank account or pocket, that may change the picture. Your effective roll is actually $125, so if you're using a 20x guideline, you can still play NL 5.