Email Received: Your AWS Free Tier expires soon

What's the exact wording on the email - does it say that your 12 months is almost up, or does it say that your allocation for this current month is almost used up? If it says your 12 months is almost up, but you only signed up 2 months ago, log a billing support case at https://support.console.aws.amazon.com/support/home#/case/create

It's also worth noting that you don't get everything free for a year. Yes you do with EC2, RDS, S3, and others (subject to limits, see below), but others you may only get free for 1, 2 or 3 months (or not at all). https://aws.amazon.com/free/?all-free-tier has more details.

It's also worth understanding that "free tier" doesn't mean everything is free. You can have (for instance) one small EC2 instance, with a modest amount of disk, running continuously for a month and not be billed for it. If you have two of these running 24x7 for the entire month you will (to all intents and purposes) get them free for the first half of the month, and have to pay for both of them for the second half of the month. If you choose a bigger instance type you don't get any of it for free, and are will be charged from the first minute that it starts running. The FAQ will likely answer all of your questions far better than I ever could https://aws.amazon.com/free/free-tier-faqs/

"We are also assigned to 4 regions, why is this?"

Where do you see this? Got to your billing account https://us-east-1.console.aws.amazon.com/billing/home#/account and about 2/3rds the way down the page you land on it should show all the regions that are enabled by default (17 I believe), as well as 10 newer regions that you can opt-in to.