You need to investigate further and try to find out if they are coming in, or are in...

" is common to find carpenter ants in homes during spring. It is important to try to determine whether the ants are coming from an outdoor or an indoor nest, although this can be difficult. Their presence is not sufficient evidence to conclude that there is a nest in your home. You may be able to make a more accurate determination based on when you first see carpenter ants. If you find carpenter ants in your home during late winter or early spring, that suggests the ants are coming from a nest in the building. However, if you see activity later in the year, it is less clear if the nest is in the building."

Finding large numbers of them MAY be a sign the nest is in your house....walls, behind tile? A pest company might use sound locators to check, they have equipment that would pick up the sound made by chewing as they tunnel.

Or, if not your window, what about your vents? I had a surge of little moths in my bathroom last Fall....finally figured out they were coming in around a space with no insect screening where the fan was vented to the outside.

Are the ants in the bathroom the same as the ones in your bedroom, which you described as "tiny"? If so, not carpenter ants. You still need to figure our how they are gaining entry into your home, and fix that problem.

In the meantime, you may experiment with a boric acid bait, like those manufactured by Terro. I've certainly had terrific luck with the liquid bait stations. But even if you completely get rid of this batch of ants with a bait product (set up where you see plenty of ants), you must still figure out their access points.

Bait trays must be put out where you see ants. Let them come and swarm the bait tray unhindered. Believe me, they will SWARM. They will return to their nest with a full tummy and spread the boric acid tainted bait throughout the nest in a very short time.

You must not use sprays or anything else to stop their foraging behavior or the bait won't work as well. The activity shouldn't last very long....a couple of hours.

Don't use bait trays in areas where pets or children have access. I assume that you have neither because of the other products you've used.