Hello, I understand your concern. Pinworm infection can be frustrating. The reason why the repeat dose is after two weeks is to prevent reinfection. The reason for this is that pinworm eggs can survive in the surrounding environment for up two weeks. So I strongly recommend you take your second dose of Albendza in two weeks. Also, in order to prevent reinfection, it is mandatory that all the household members be treated too. I hope this helps. Wishing you good health.