It is fine to eat chocolate in moderation it will not upset your skin.
Ensure that you maintain your skincare routine.
Use a cleanser suitable for your skin type morning and evening.
Follow with a moisturiser that has good SPF coverage (minimum 30+) during the day, as the weather is still quite warm, and the UV index very rarely drops under 3. It is recommended to wear sunblock whenever the UV index is 3 or above. Combining your moisturiser and SPF helps to minimise the number of products you use and simplifies your routine.