It is very likely that this will improve a lot with another week of waiting. if it persists, you can get a tiny amount of hyaluronidase injected to one side. Do not press on it or massage it, for best results.
Swelling if very common after lip filler . With swelling you will notice unevenness in the lips which is normal. I would recommend to wait 2 full weeks before your follow up appt as it takes that long for product to settle and swelling to subside.
Swelling is always uneven, but yours is more uneven than I'd say is common. However, I wouldn't recommend you do anything until the full two weeks has passed. Don't press on it. If you do have product or a hematoma there that's only going to make both of those things worse. Keep your hands away from the area and return to your injector in about a week. That way everything that can, will resolve by that point, and you can see what is left to deal with, if anything.
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You are pretty asymmetric at this point. Were you bruised post injection? This swelling could represent a small hematoma in the lip. If it is, you should notice gradual improvement every day. If it persists, you will need to see you doctor to have it evened out with either more juvederm or some hyaluronidase.
You will need to wait. However go back to your doctor and show him what has happened. Unequal swelling can often occur but usually evens out in a few days if it is only injection swelling
After having Juvedrem injections to the lips, it is common to have some uneven or lumpy bumpy texture until the product has "settled in". Different injection techniques are more likely than others to have this happen. For right now I would give this a little bit of time. Once the initial swelling has settled then consider having another evaluation to determine the best way to proceed