Oh gosh, @lilli64, this sounds horrible. Generally, patches are only worn for 48 hours (2 days). Here's some info from Mayo Clinic
- Allergy skin tests https://www.mayoclinic.org/tests-procedures/allergy-tests/about/pac-20392895
Excerpt
"Risks
The most common side effect of skin testing is slightly swollen, red, itchy bumps (wheals). These wheals may be most noticeable during the test. In some people, though, an area of swelling, redness and itching may develop a few hours after the test and remain for a couple of days.

Rarely, allergy skin tests can produce a severe, immediate allergic reaction, so it's important to have skin tests performed at an office where appropriate emergency equipment and medications are available."

Have you been able to see your doctor yet? Has the inflamed area calmed down now?