HELP I HAVE WORMS

I'm 9 weeks pregnant and I have threadworm also known as pinworms... I have had this for a week almost now and I suspect that I got it from using the filthy toilets in my work & not washing my hands thoroughly. 
I can't take medication to get rid of them because I'm pregnant. 
Please please please does anyone know how to get rid of these horrible parasites without medication? 
Apparently they will die off within 6 weeks if you stay hygienic I cannot wait that long I am losing weight and sleep