You can't. Hire a pro
I agree with Rymea. You can try doing it yourself, but bed bugs are so small that it's very hard to find them all. That's why a pro is better. If you want to try yourself, vacuuming and Diatomaceous earth can help if none of them are missed and the right amount is used. There are several other steps too. Take a look at this article to understand what you will need to do. Wishing you the best.
Hot Shot is best I've found. Start from top of wall and spray downward. Get a roll of wide, clear tape like they use for packing. Place tape so it overlaps sides of switch plates and outlets. Do outlets and switches in rooms that share a wall with the treated area. Get zip up bags for mattress and springs(Target, Amazon, Wal Mart).
Wash ALL bedding, clothing, pillows in very hot water and dry on hot. Take any non washables to dry cleaner before you start and pick up after you finish. Watch for any stragglers.
Here are some ideas from Pinterest that you might try Here is an idea from Pinterest https://www.pinterest.com/pin/243053711126539595/
Hi Carol - Despite always preferring the all-natural method, everything I've read says it's best to go with the professionals for abatement. After the bed bugs are eliminated, this article is how to clean a mattress in 5 easy steps. Hope this helps! Hugs, Holly
PS - We have a FREE eBook with recipes for all of my homemade and all-natural cleaners. You can download it here --> https://pinkfortitude.com/thank#GreenClean