To be honest, not knowing what the fish you just bought eats signifies you realy haven't done any research.
Read the link in my signature about cycling without fish (fishless) and return all those fish to your LFS. I know this must seem rather abrupt to you, but you need to appreciate that simply adding fish to a tank like this isn't going to get you anywhere.
If you honestly want to keep fish, healthy and happy, you need to, first of all, get rid of those goldfish. NO fish should be used for cycling and goldfish are one of the worst choices because they are coldwater fish and produce a huge amount of waste.
The huge amount of waste means ammonia will biuld up much faster and you're likely to get deaths very early on. Being coldwater fish, you need to keep the temperature lower - which slows the cycling process.
If you don't already know this, the cycling process is basicaly when 'good bacteria' growing in your filter media and substrate convert ammonia (found in fish waste, rotting food etc) to nitrIte and then to nitrAte. Both ammonia and nitrite are deadly. Nitrate is less dangerous as long as it is kept at levels below 20-40ppm by doing regular water changes with de-chlorinated water.
Three-spot gouramies (blue being one of the many color morphs of this species) grow to 6" and, though extremely hardy, also become very aggressive and are not biult for a colwater environment like the goldfish are. They need quite a large tank and you need to immediately work out what sexes your gouramies are as males are likely to kill each other once mature, as well as being notorious bullies of other fish, including the females.
Also, I don't understand why you added the gouramies if your tank isn't yet cycled. Now you've added even more ammonia to the tank and, not only will this prolong the cycle, it's likely you'll have a lot more dead or damaged fish as a result.
Like I said before, the best option right now is to return all the fish you have in this tank and start a fishless cycle. Unlike a cycle with fish that takes 6 or so weeks, a fishless cycle usualy takes only about half that and it gives you a chance to actualyr esearch what you are getting so you know it'll work in your tank.
You didn't mention tank size - please do.
Also, check your water parameters and do a water change if you have any detectable ammonia or nitrite. Keep this is up, changing around 30% every other day, until the tank 's ammonia and ntirite levels have both begun to drop. Alternatively, return the fish and you need not do ANY water changes until the tank's fully cycled as you won't need to worry about keeping the fish alive.
edit: Just to make sure, the tank's not cycled yet right? If it is, still make sure you've returned those goldfish and work out what sexes your three-spots are. Also please mention the tank's size.