Recent drop in net speed unbearable

[413x]

My Internet download speed recently dropped from 55 KBytesps to 42 KBytesps which is like 20% of an already slow speed

Now pages take 15 seconds plus to load and picture heavy pages are a no go as is youtube even on 360 res

I know it's never going to be fast in the country side but surely this is just stupid

I've always thought that round here speeds are all the same but I'm now thinking about an isp switch

Is the Best way to get a speed estimate to ring them up or what?

Thanks