lingual braces questions

So, I have quite the history with braces. I had the regular old fashioned kinds at the age appropriate time. My teeth shifted mostly because I have too many for my small mouth and did not wear my retainer as much as I should have. So, later I decided to get Invisilign and thats when I turned into the quintessential money pit. I could not get myself to wear them. I know many people praise these things but because they were temporary I could not keep them in. It wasn't so much the pain as me feeling like a fool in them. I spoke differently, they reflected too much light, my saliva bubbled up inside of them, I couldn't snac, and yes my friends said they noticed them which made me even more self-conscious. So, I feel shame when I say I can't wear them because I wasted a lot of money and I am still unhappy with my teeth. So, the orthodontist suggests lingual braces (I think I am in need of the permanence) and I have questions because this time I really don't want to jump into things and waste more money. Do they hurt insane amounts? Does your tongue feel awful all the time? How much more painful are they then regular braces? Do you speak normally with them in or is there always at least a little lisp even after you get used to them? Are they really invisible, and I mean really? And my most inappropriate question: Are blowjobs completely out of the question? Hope someone can help!

This maybe a stupid question on my part but what are lingual braces? How much different are they from the traditional braces?

They are braces that go behind the teeth

[chupche]

Just wondering if you went with the ibraces and if you have the answers to your questions. I went for an invisalign consultation and I really don't think I will be able to wear them for over 20 hours a day. I would rather have something totally invisible, but wondering if and how much it affects speech...........[