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If you have bed bugs you definitely need a professional. There are DIY products on the market, but in all honesty, they don't work well because there is so much more work involved to totally eliminate them. You'll end up spending a lot of money on things that don't work. Call a professional first and let them handle it. Plus they can help you prevent the bed bugs from coming back. Wishing you the best.
Here's a video that might help - https://www.youtube.com/watch?v=CjZxUk8heZA
This product worked for a friend of mine. https://amzn.to/2JVhUDk
When they are gone, I recommend putting your mattress in one of these: https://amzn.to/2InLsX4