My billing is completely out of line for the last two months

I understand your concern about the unexpected increase in your AWS billing. This is a serious issue that needs immediate attention. Here are some steps you can take to address this situation:

1. Review your AWS Billing Dashboard: Log into the AWS Management Console and carefully examine your billing details. Look for any services or resources that are consuming more than usual or any unfamiliar charges.

2. Check for active resources: Go through each AWS service in your account to ensure there are no unused resources still running. Sometimes, resources left active can lead to unexpected charges.

3. Use Cost Explorer: This tool can help you identify which specific resources are incurring higher costs than usual.

4. Set up billing alerts: If you haven't already, set up AWS Budgets or Billing Alarms to notify you when your usage approaches certain thresholds. This can help prevent future surprises.

5. Contact AWS Support: This is crucial. Open a case with AWS Support under the "Account & Billing" category. Explain your situation in detail, including the fact that your bill has increased 4x from your usual charges. AWS Support can investigate the issue and potentially assist with resolving billing discrepancies.

6. Consider optimizing your usage: Review your current usage patterns and see if there are ways to optimize and reduce costs.

7. Evaluate alternatives: If the increased costs persist and are indeed the "new normal," you may need to consider alternative storage solutions as you mentioned.

Remember, AWS Support is best equipped to help with account-specific billing inquiries and can provide detailed guidance on your particular situation. Don't hesitate to reach out to them for assistance with this urgent matter.
Sources
unexpected billing price | AWS re:Post
Stop the Bills please | AWS re:Post
unexpexted Billing | AWS re:Post

Whwn you say that you are going to have to move your storage if this is the new normal, does that mean you've identified storage as the service whose costs have increased?

Would this be S3 or EBS?

In last month's bill https://us-east-1.console.aws.amazon.com/billing/home?region=us-east-1#/bills?year=2025&month=3 scroll to the foot of the main pane and under the Charges by service tab expand the service(s) whose charges are of concern.

For comparison you might want to have the bill from a couple of months previous open in another tab https://us-east-1.console.aws.amazon.com/billing/home?region=us-east-1#/bills?year=2025&month=1

Also, as @iBehr says, have you been using resources that have recently ceased being part of your Free Tier entitlement (which in most cases is 12 months after the account was created)?

You can access support in the top right of this page under Resources > AWS Support Center.

You might check and see if you were using some resources under a Free Tier offer that has run out. You can check this in the Billing & Cost Management Console and then choose Free Tier on the left.