did you also tape up along the baseboards, outlets, or any possible cracks? either way i would move if i were you and its best to get rid of your mattresses but until then, here is a for sure solution the only difference with your situation is leave a perimeter of boraxal (borax & salt) etc. after you vacuum & follow directions below, BUT MAKE SURE YOU VACUUM ALL OUTLETS AND CRACKS IN BASEBOARDS, also i don't know if it matters but i didn't use duct tape i used masking tape, i read one article where this man put his bed posts in tupperware containers with masking tape around it. when you have bed bugs it won't hurt to try
Bed bugs are the worst torment there could ever be but I have a simple solution. Before this I had spent over $200.00 on chemicals that never worked. This is a very thorough process but if you want to get rid of bed bugs forever then this is your remedy. Things you'll need:
Old Salt shaker (I used an old garlic powder shaker with the big holes on top
Borax 20 mule team laundry detergent
Salt *regular table salt kosher iodized doesn't matter
vacuum
garbage bags
I personally did all my things, clothes, boxes, important documents in containers, carpet, everything. Even if the floor was tile. I took my mattresses outside (you'll want to)
1st you mix the borax with the salt *1/2 with 1/2
Then shake up and shake powder mixture over everything. When you get to your mattress its best to do outside because you will immediately see them pop off.
2nd with the powder mixture I place all my clothes in plastic garbage bags and then all my shoes and left them in the sun for 3 days
I left mix on my carpet mattresses etc for 24 hours and then vacuumed up. I even vacuumed all the mattress seams and on top of it sides box spring.
Then I made sure i got every corner and outlets, cracks etc. I washed all my sheets blankets in hot water and washed all my clothes in hot water too.
Then I taped up base boards and outlets with masking tape. and even tho it didn't look stylish I left it I repeated the whole process 2 more times after that and 3 years later no bed bugs .
It really is a lot of work but is worth it. everything costs less than 10.00