Potentially you might need one of these two 24hr 7 day services, its the same number and they usually arrive in around 10 minutes and although they won't solve your problem could save your life
Telephone number - 999
Ask for ambulance or fire
Unusually for me I'm being sarcastic however if what you are saying is correct
And bearing in mind you admitted to have limited experience
You had a fault, which you have solved connecting an earth wire
This MUST be incorrectly connected somewhere to have any effect on the live operation of a lighting circuit
Therefore, in doing so, how do you know that you have not inadvertently caused a fault somewhere on the circuit that wasn't there before or that you are not aware of?
This fault, if it involves an earth wire could now be causing a fault at any accessory on the circuit
An example of this could be a metallic light switch plate in any other room becoming live If this has not been correctly terminated (I have seen this where switching the light on caused the screws to become live)
One or more of the light fittings casings you have now working in the en-suite/bedroom could now be live, or may become live once the lights are switched on
You may have a cable or cables in the loft which are now live awaiting some unsuspecting person to reach into the loft for the Xmas decorations or maybe crawling in the loft and touch it perhaps months or years later
Only this week I came across an junction box with the earth wires twisted together outside the box with one separated
Earth wires twisted like this are not uncommon in older houses/installations but the single wire stood out and was in fact live, investigation showed what I suspected was at some point as a live switched live and neutral supply for a long since removed extractor fan
All of these scenarios are realistic potential problems and for your own peace of mind an electrician will be able to test, check and leave you with peace of mind
You may well have nothing to worry about but no Internet forum in the world could tell you that for sure