Welcome to HealthcareMagic forum.
It looks like you might have some kind of inflammation happening at the site of needle insertion. If the pain is intense or if you see dilated veins you need to consult a doctor to rule out active infection.
While you consider the option of visiting your physician's office, you can place warm compresses over the affected area and take some anti-inflammatory drugs like Advil
twice a day. Thrombophobe ointment is available over the counter are routinely used in such cases. Check with your pharmacist if they have any such preparation that can be used.
Hope this answers your query.
Wish you a speedy recovery.