Pacifier fell on floor


My 4 week old dropped his pacifier on the floor at my grandparents house so I gave him a clean one. He dropped that one in my lap and i went to put it back in his mouth and I grabbed the one that fell on the floor and put it in his mouth. I quickly realized and took it from him but I’m freaking out that he’s gonna get sick. I’m sure I’m overreacting but I’m a first time mom so it’s to be expected I guess.