I just got back from a 1 and a half month break about a month ago, and it probably took me about a week or two to get comfortably back into place. Granted, I was coming back from an injury, so that definitely took some effect, so don't take my word verbatim. Also, there were some scores I set in the first few days back that were insane compared to where I left off, so there's just a lot of variables here. Either way, don't go in expecting to be at your immediate skill level, as it might take time depending on the person, as well as other extenuating circumstances. Just keep playing and you'll get back there eventually!