Hello Thanks for writing to us with your health concern. Generally, most medications are avoided in the first trimester. THe safest deworming tablet is generally Albendazole 400 mg stat tablet. However it is best to avoid taking it during the first trimester. Most drugs will be safe once the second trimester starts. And regarding your worm infestation, it is best to have a diagnosis before commencing any treatment on your own. Worm infestation can be easily diagnosed by a stool examination or a lung screening. Consult your obstetrician for treatment accordingly. ANd avoid eating outside and maintain good toilet hygiene. Avoid contact with pets and cats and dogs. Boil your drinking water. Take care.