Hello & Welcome to JustAnswer. This site is called JustAnswer and we are third party support company. We did not take access from you (we are not Gmail/Google) but what you did by creating a new account is have had the interface changed which is the way it works when you have multiple Gmail Account. I'll help you with the method on how to switch and choose between accounts. Are you currently signed into any one of the accounts?
Please sign into any of the accounts by going to www.gmail.com - Let me know when done.
Now on the top right side, you should be seeing 3 icons, the last icon which is a circle (may have your picture in it, or the initial letter of your name) click on it and click Add Account or choose an account from the list. Let me know if that works for you or not.
You can now click on the account you want to sign in to. This is how it will switch. You just click on the account you want to view and that's it.
Welcome, and if you can take a second to rate my service by clicking the star icon that will be greatly and highly appreciated. If you need assistance, feel free to send me a message here.