Hi dear and thanks for your query.
Threadworm are parazites that are treated with
mebendazole but you cant use this medication because it have side effects in your
pregnancy ,hence follow these tips to :
Wash all night clothes, bed linen, towels and soft toys when you are first diagnosed.
Thoroughly vacuum and dust the whole house, paying particular attention to the bedrooms.
Carefully clean the bathroom and kitchen by damp-dusting surfaces and washing the cloth frequently in hot water.
Avoid shaking any material that may be contaminated with eggs, such as clothing or bed sheets.
Keep your fingernails short.
Wash your hands frequently and scrub under your fingernails.
Threadworm don't effect your pregnancy.
All the best