There are options that you could check into.....eating raw garlic (like chewing and eating the freshly peeled clove) diatomatous (did I spell that right?) earth.
I don't know the safety during pregnancy but you could research it. Clove, wormwood, black walnut....all could be checked for safety during pregnancy.
We had a roundworm issue and our ND / MD, had my daughter take the DE on an empty stomach and the garlic 30 min later. That worked for her.
Again - I know these...