Dealing with Asbestos Tiles

[Daniel Oren]

I'm flipping a house currently (I'm pretty new to the profession), and I just recently found out that the old floor tiles are almost definitely asbestos tiles. I've already put new floors over all the tiles, except in the bedrooms which I'm bringing Lowes in to install carpeting over these asbestos tiles. 

Before I realized they were asbestos tiles, I removed at least 20 of them. I also have the fan blowing in the house all the tiles, so with 20+ tiles being removed, and the fan blowing, I'm assuming I've gotten the asbestos airborne. 

What should I do at this point? Is it okay to enter the house to continue other work if I wear one of those expensive $40 ventilation masks? Most of the work I've done in the house, I've used the ventilation mask for. Now I'm worried and don't want to even go back in the house at all. Am I being too paranoid? Or am I right to not enter the house, even with the ventilation mask? Thanks in advance. 

Dan