Ordered pregnancy tests online today...?

I had my last AF starting on September 5th, and I believe I ovulated on the 19th. We BD'd every other day this cycle and every day from the 14th to the 20th. Anyway so I ordered some First Response Early Results tests and I was wondering if it would be safe to just take them whenever they arrive in the mail? They should be coming sometime between the 28th and the 5th. Would it be accurate because they are the early tests?