Forecast Realty, Inc.
CA DRE 01338444
Yes, consulting with an attorney is good. If you can't afford one, sometimes there are advocacy groups that will help.
The lease tends to state how many days grace period you have, which applies to when the landlord can assess a penalty. But a Notice to Pay or Quit can be issued for a variety of reasons listed in the above article.
But the best solution tends to be to talk to your landlord and pay your rent. If you are a good tenant, then the landlord should be happy to keep you there.
The answer would be conditional to the content of your lease. I presume you are month to month with no lease. Review the documentation you received when you moved in to determine what the grace period if any is. Old Torrance doesn't have rent control in place. If after reviewing your documents you are still in the dark or want to dispute the landlord's actions you should consult with an attorney.
Wishing you luck.