Not to be disrespectful here, but did you drop the slide or frame on a hard surface? Or put either in a vice or similar tool? Or use any sort of impact tool or hammer on the thing?
Are there any small pieces of grit or random metal chips on the slide rails that are causing it to bind.
If all parts are removed from both slide and frame there are no magic hidden things to get in the way of the fit and steel, simply does not spontaneously expand or contract, does not happen, in 5 days or 500, nor with normal temperature extreams.
I suspect you have somehow "tightened" the slide to frame fit on your gun to the point where you have an interferance fit... there are many gunsmith techniques for doing this that involve varyations on tweaking by squeezing the slide and or frame rails.
If you want to see where things are binding, degrease all parts throughly, put black perminant marker on all bearing surfaces i.e. the frame rails and slide chanel and then work it together, the areas of interferance will have the sharpie worn off of them.
Professonal help given where you are at now would be strongly advised. If you are lucky with a little file work and lapping that will be all that is required, you could possibly do this with guidance but given where you are it might be better to simply have a smith do it as when building a 1911 up you generally start with slide to frame fit, if you end up altering things too much other tolerances might need to be tweaked and you get in to cascading problems or altered tolerances.