WIF - Never stretch springs. Any springs you've screwed with - THROW AWAY. And quit "limp wristing" the pistol when you shoot - just because it's a "girl's gun" doesn't mean you can get away with sloppy technique and expect it not to malfunction.
Seriously - get the standard weight Wolff spring pack, replace ALL of the included springs, and THROW AWAY the old ones. It's cheap insurance for any used semi-auto. FWIW, your problem doesn't sound like a magazine spring. If the slide won't recoil far enough, it can't function. Check for friction points and broken parts. Clean it correctly and use a quality lubricant on all moving parts. Too much or too heavy of a lube (grease) will also slow the reciprocating parts enough to cause malfunctions. HTH - Peregrino