There are a few items to check and evaluate if your internet connection is limited:

1. Check the installation of your hardware and ensure that all parts are connected correctly.
2. Check the configuration of the Wi-Fi security if you are using a wireless connection.
3. Check for any recent changes in the router or ISP that may have caused the change in connection.
4. Check for any loosecables or wires that may effect the connection.
5. Connecting directly to the modem may reveal any indication of a limiting factor in your connection.