Hi, your symptoms are like pinworm infestation.symptoms like Itching of the anal or vaginal area,Insomnia, irritability and restlessness,Intermittent abdominal pain and nausea will be there. Dirtiness fungal infection also causes itching. Go for stool and blood tests. Precautions in case of pineorm: thorough washing of bedclothes, bed linens and underwear. For best results, the entire family should be treated. Kindly consult gynaecologist or general physician for furthur evaluation and treatment.