Welcome to the forum, June!
Regrettably, I cannot see the image you have posted?!
However, I would recommend that you place your guinea pig on a clean white towel, and in a dark, quiet, and warm room!
Placing your guinea pig on a clean white towel will help to prevent infection, and will allow you to monitor whether your guinea pig is bleeding!
Placing your guinea pig in a dark, quiet, and warm room will keep your guinea pig calm, and comfortable!
Please continue to monitor your guinea pig periodically, to ensure that your guinea pig is eating, drinking, and defecating etc!
However, your guinea pig will need to be examined by a veterinarian as soon as possible - I would recommend that you arrive at your veterinary practice as they are opening!