I have been having exactly the same, its so horrible! I phoned the hospital yesterday about it as I was concerned about the smell!
The hospital advised me that it is normal and said - imagine you have scraped your knee, it becomes a bit watery before it is trying to scab, this is what your cervix is doing and what you can see.
She advised me to hang on a bit (I had LLETZ 8 days ago) and give it another week or 2 to see if it stops. She did say that if the smell does become unbearable and the watery discharge turns a greeny colour I need to go see my GP.
Also, if the smell and discharge doesnt calm down in 1, 2, or even 3 weeks then go to the doctor as it may be B.V due to the dyes they use when completing LLETZ.
I wish the hospital told me all this whilst I was having it done! I might have felt more normal then!
Hope that helps!