Have you tried switching to WCDMA only?
Globe is now 3G everywhere, I don't know what are you talking about.
Maybe Paulo and Glenn can help you this?
Or you may want to do a self-service troubleshooting, go to settings, then wireless and networks, then mobile networks, then network mode, then choose WCDMA only to force your device to use 3G only.
You can refer to Troubleshooting | Help and Support for more info.
If you still experience "E" connection, I suggest you to raise this to our Twitter Specialists at http://www.twitter.com/talk2GLOBE or any of our support channels listed at http://www.globe.com.ph/contactus so they can help you isolate the issue, and if there's a need to log a network case for investigation.
If I may add, environmental factors can actually affect your signal quality. For example, are there any new environmental barriers (i.e. A newly constructed building)?
Your surroundings can dictate the quality of signal you receive due to what is called penetration loss, going back to the example earlier, a newly constructed building made of concrete can increase penetration loss, making it harder for you to get a better signal quality. This can be seen if you checked if your outdoor signal... once outdoors, you'll usually see a better quality in terms of signal.
If your outdoor signal quality is the same as your indoor signal (meaning it's both EDGE), it may mean that there is something else that may have caused this sudden decrease in signal quality, and it's best to contact the hotline so that they can have it checked (of course that is after basic troubleshooting has been performed).