Open the modems internal SCC (system Control Center) and check your remaining data (FAP) status and any system condition errors by entering 192.168.0.1 into your browser.
Look at the colors of icons #1 & #2:
If you are not having any system errors and not in FAP then, as Bill suggested, run a series of speed tests and post the results.
Hughes will only accept speed test results from two sources .....
Their own found after logging in to your dashboard:
I would run both the Speed and the Web Response tests
Or from testmy.net:
the 12 MB test.
Do the tests from a single directly connected computer.
Or be like me with a signal strength of 31 due to a layer of ice on the dish and wonder just when I'll hit "cut-off".
Anytime there appears to be a service issue a user should check the SCC first for clues ....
It can save a lot of time and frustration.