01/28/2013 AT 07:00 AM EST
is on the mend.
The ailing Silver Linings Playbook
starlet is finally feeling fine after a reported bout with pneumonia
"I'm so much better," Lawrence, 22, told reporters backstage at Sunday's Screen Actors Guild Awards
, where she won for lead female actor. "I'm a lot better. I've been on a lot of medication and got a really cool inhaler, so I'm doing much better."
The actress – who was "laying low all week," a source told PEOPLE – missed Saturday's Australian Academy of Cinema and Television Arts International Awards due to the illness, according to her costar Jacki Weaver.
"Poor Jen is really sick," Weaver reportedly said
, after accepting an award for Lawrence. "She really is sick. She has pneumonia."