What Are These Tiny Blisters on my Lip After Augmentation?

I had restylane injected in my top lip on Wednesday. I bruised on both sides of my lip where there were several injections made. Tonight I have a cluster of tiny little blisters on my left side that is itchy and the area is beginning to swell up under the blisters. Is this a cold sore forming? Should I try to treat it with Abreva or should I wait to see what it looks like tomorrow? I have a cold sore that comes out on the other side of my bottom lip (right) when I get too much sun. Thank you