Weird network issues

Sometimes when I boot up my pc, everything looks fine. The little icon in my toolbar says I have a working ethernet connection. But when I try to load up pages in my browser, Chrome throws the regural "no internet connection" error screen. The weird thing is, some pages, like youtube and google, work just fine. I have to go to device manager and turn my "Realtek PCIe GbE Family Controller" on and off again to make sites work like normal. Also, it doesn't seem to be Chrome's fault, since discord, steam and other things don't work either.

In addition to the network issues I occasionally get a blue screen saying "atikmdag.sys" is at fault.

I once uninstalled the Realtek PCIe Gbe Family Controller from device manager and installed a new one from Realtek's website. It worked and for like two months I had no issues at all. Now I just suddenly started getting the ethernet issue and blue screens.

Specs:

AMD FX-6300

XFX HD 7770 1GB

2x4GB HyperX Blu ddr3 ram

Asus m5A97 R2.0

WD Blue 1 TB

Some XFX 550W 80+ Bronze power supply

Thank you in advance for any advice!