How long after birth until your rings fit again??

Jen • Mommy to a beautiful baby girl!! Isla Marguerite was born January 2, 2017 at 12:45 p.m. 8 lbs 2 oz, 20.5 inches 💕👶🏼🎀 TTC #2 May 2018! Early miscarriage at 4 weeks June 2, 2018 💔 trying for our rainbow 🌈 baby! BFP July 27, 2018 our rainbow is due April 10,
I'm 4 weeks PP and my wedding rings still don't fit :( will this eventually go away or should I consider resizing them? I would hate to resize them too soon and then have to get them sized again. How long should I wait?