I Donated Blood 8 Weeks Ago … When She Injected

I donated blood 8 weeks ago … when she injected the needle it burned a little and didn't feel right (I have donated about 40 times previously) … about 10 days later it started to itch and the itching comes and goes (for the past 5 weeks … today I see 4 pink, slightly raised patches around the injection site … they don't hurt at all but they are itchy