Hey, welcome to BL! You slipped in a random "swim" into one of your posts, we don't use that here and given that you used "I" in the rest of your post it is pretty pointless (it's pointless anyway)
Mixing downers is always potentially risky and we can't tell you for sure what will be safe - but as you have already taken it, it's a bit late anyway! 3 T3s is 90mgs codeine, right? So not a huge dose. That is a fair bit of vodka, I'd have recommended not taking any other CNS depressants, but halving your dose of codeine is a reasonable thing to do. Definitely don't take any more or add in a 3rd downer though, and be aware that alcohol (and other downers) can impair your judgement and memory, leading you to accidentally take more than you should and overdosing.
If you already have respiratory problems, to be honest I think you should avoid mixing any CNS depressants at all, especially opioids. It isn't worth the risk..
edit: In fact, without knowing how severe your respiratory problems are, it is impossible to say that what you have taken is safe - ideally get someone to stay with you or check up on you, just in case. Probably OTT but as I said, with an underlying condition it is very hard for us to say if you are safe or not...