DJxSLU

Hello, just the other day i was pulling out of my driveway and noticed when i tried to turn the steering wheel to the right on my 93 Camry it was very stiff and gave me a lot of resistance. I checked my power steering fluid level and it was indeed low. I filled it back up and was all set for a few days. It is now 2 days later and it is happening again with the same problems. Anyone have any advice, i read that Stop Leak might help but im not sure, all i know is that in the next 2 days i have to travel 150 miles each day(Monday and Tuesday), so taking it into the shop isnt an option that helps me right now. Thank you.