Terro and ants

Aw

I dont know where to post this but we have ants!! Its so horrifying, Im disgusted. We keep things clean but my landlord refuses to fix this door... Its a sliding glass door and it is off the track and doesnt seal out the outdoors. My SO and i are pretty clean so the fact that theres so many is pissing me off! None of them were in a pile or line just scattered everywhere so we deep cleaned. We also placed Terro and now that we did that im afraid that every single ant that lives outside is attracted to it and coming indoors(They are now in a steady line and pile). Theres two by the door now and there's thousands. Does anyone know how long the Terro will take to work? Especially with this many...?? Im pregnant also so is it toxic to be around? Im so upset i jyst want to cry and i dont want to cry over some stupid ants. If anyone has any suggestions id love to hear them