swaddling

Sarah
My baby girl is 3 months and half and she still likes to be swaddled, but I only swaddle her when she's on the bed and mostly bed time. If I put her on the swing she'll sleep without being swaddles. My question is when do I stop swaddling her? Is it ok to still swaddle her at this age? I am afraid she gets used to it and I'll be stuck with small sheets to swaddle her with as she's getting bigger. They're already smal on her haha 
Thanks