Moral High Ground and Regulations
	
	
		Mate you walked into that one and maybe you should have seen it coming.  The moment you admit to doing something wrong don’t try to explain.  All those sitting on the moral high ground will let you know about it.  They will pontificate about all the things that you should not have done and all the things that could have gone wrong.  After all that, best not play with brakes unless you know what you’re doing.  
Now for all the moral high ground sitters, ok he stuffed up.  If we all just throw our hands in the air and paid a professional every time we encountered something we had not done before how would we learn?  What happen to the spirit of give it a go?
Regulation/laws only allowing professionals to do certain types of work!   In order for these things to work you have to have the ability to enforce the regulations.  Otherwise it just ads to the volumes of laws that just sit there and makes some feel good but not much changes in actual practice.  I can imagine plenty on here have done a bit of house wiring or pluming.  Not me of course.
To the OP, you’re on the right track now.  A professional should sort your brakes out.