I checked my online Product Application Guide and your Corolla is supposed to be using an oil viscosity of 10W-40, not 5W-30. Using an oil viscosity that is too thin will reduce oil pressure and increase engine wear. This is probably why the oil pressure light is coming on. When any of the idiot lights on the dashboard come on, including the oil pressure light, this isn't to just make you aware of a problem, but to alert you to impending disaster.
With Jiffy Lube using the incorrect oil, they need to correct the error they made and install the correct 10W-40 viscosity oil before your engine is seriously damaged. I doubt they want to buy you a new engine for your Corolla.
I strongly recommend against the use of pour in oil additives. Motor oil already comes with additive chemicals in it to enhance its performance and protection abilities. Pouring in more additive chemicals can upset the delicate chemical balance of a motor oil and have unplanned and negative affects.
If a cake recipe calls for 2 eggs, adding 2 more eggs to the recipe will not make it any better, it will ruin the cake.
For extending engine life, improving fuel economy, reducing maintenance costs, improving cold winter starting, reducing emissions, improving power/throttle response and saving you money, AMSOIL synthetic motor oils are the way to go. I will get you wholesale prices, (the same prices I pay). Check out my website below and private message me here of send me an e-mail via my website and I can get you a quote. I've been an independent AMSOIL synthetic lubricants dealer for over 25 years and this is my private business. Contact me.
In the meantime, get your Corolla back to Jiffy Lube ASAP and demand they put in the proper 10W-40 motor oil, before your engine is damaged, or worse. Make sure to bring your receipt and speak to the manager. They need to correct the mistake they made. 10W-40 motor oil is the viscosity Toyota engineers specify for your Corolla. If you have the owners manual for the car, it will state this. Don't let Jiffy Lube tell you 5W-30 is fine. It's not. This is an urgent matter so take care of this immediately. The longer the engine uses the incorrect oil viscosity with the low oil pressure light on, the more and more damaging engine wear is occurring.