If you don't have a fever you don't have West Nile. Also, the size and itchiness of the bite has nothing to do with West Nile; it's only a measure of your body's reaction to mosquitoes. For instance, when I get bit I hardly tend to react, but my wife wells up in 4-inch-wide, red, swollen bumps that look horrible. Even if you don't usually react this way you can develop a sensitivity and do so. Doesn't have anything to do with West Nile or any other disease potentially transmitted by mosquitoes.
Also, seven people out of the 11.5 million residing in your state may sound like a lot, but if you consider how many mosquito bites people in your state got last year vs how many people got West Nile, your odds are better of winning the Powerball lottery. It's far less than 1 in 1 million.
Since our brains have a hard time comprehending odds like this it seems like there is still a chance even with 1 in 1 million. To put it into perspective, consider that you are filling a swimming pool with water. However, you can only fill it one drop at a time, one drip every second. It would take about 1 million drops to fill the pool. This would take a lifetime of dripping steadily. Now imagine that just one of those drops was maple syrup instead of water. Just one drop out of an entire lifetime of drip-drip-dripping. Now say that on a specific day someone asked you to taste just one drip of water as it was being added to the pool. Is it going to be maple syrup? No. No, it isn't. It's going to be water. That's 1 in 1 million, and your odds are even better than that.