In my opinion, no booking of a consultation needed in this case. It looks like just a bruise, little bleeding under the skin due to small blood vessels getting ruptured by the needle.
Should resolve itself in a couple of days.
Keep a good diet and hydrate well and you will be good to go.
Health Tips
If you do not see it getting better as a bruise normally should, then a Phone/Video consult will be definitely recommended. You can do it at dygnosis-dot-com