About a year ago my home had a flea issue. I have two cats, but the problem came from new carpeting I had installed. The installers had put my new carpet into a van with old carpet that had come out of a house with flea issues. First of all, it's very hard to get rid of them once you have them. I will tell you how I did it.
First, I went to the vet and got flea treatment for the cats. I forget the name but it's the kind that you put the drops on their neck and it lasts for a month or so. I immediately noticed dying fleas. The second thing I did was get "20 Mule Team Borax". It's like a laundry detergent. Pretty safe, just don't inhale a lot of it. Use a mask, since you are preggers. I spread that on ALL carpeted areas. Bedrooms and living room. Anywhere there was carpet. Get it under the beds, behind the dressers. Everywhere. I used a broom to rub it into the carpet. I then let it set for a 24 hours then I vacuumed it up. I did this twice. Then I vacuumed everyday, several times a day for about a week. And in all honesty, it ruined my vacuum, but it was worth it.
I have ((HAD, lol)) a bagless vacuum, so after I vacuumed each room, I opened up the cannister to see if there were any "live ones". If there was, I took a pencil and "smooshed" the flea with the eraser and then put the flea into dawn dish soap. They die fairly quickly.
This method requires diligence. But it did work.
Flea bombs do not kill the eggs. It only kills live fleas. The Mule Team Borax actually dehydrates and kills the egg. This is why I never had another hatch.
Good luck!!
P.S. After reading some of the other posts, I would certainly NOT USE SevinDust in your home. It's an extremely potent insecticide. Being that you are pregnant, I would say that would be an absolutle no-no.
Free article will tell you how to safely kill fleas.
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