Has anyone had strange things occur to them after their wife had died that they ociate with her causing ?

My wife ped away recently in our bed unexpectedly, suddenly, of a cerebral aneurysm,aimee was only 24. Many strange things began happening in our apt. after that...... like family pictures would be moved, noises at night like footsteps and doorknob turning, musical potty going off by itself and our 14 month old John looking,smiling and reaching for someone who wasn't there and that i could not see.