Thank you all for the replies!
When I record vocals I make sure that my raw recordings don't exceed past -12db, and after editing I mix the whole track and put limiter which also doesn't exceed -6db. Only in the mastering phase I search for 0db. So as for gain staging I think I'm alright. As mark skinner said I did solo the track and slowly started to remove the plug-ins and I noticed that the distortion goes away and also the raw recording was around -15db but after adding the effects the recording went to -20,7db!!
As Lord Tim suggested in this and in other replies I will upload wav files of my takes and also screenshots of the FX Chains. (Please lower your volume down before hearing them and also don't pay attention to what I say because I'm singing/rapping in Bulgarian. As for the "problem.wav" you can hear in the last word a lot of distortion on the "S" sound. You will see in the screenshot what plug-ins I use). Also pay attention to the sample rate - is this a probable reason for the issue.
problem.wav