I used to get around 300mbs but for weeks now I'm not even getting the advertised minimum of 80mbs. Troubleshooting brought it up to 100mbs but only for about five minutes then it dropped back down to 30ish. Not what I'd call "ultra fast" I don't know what changed in the last few weeks but I work from home and cannot get through the workday without higher speeds. I don't want to lose my job over this. Please help.