If you've seen any bedbugs, that means there are more you haven't seen. They can hide anywhere, including cracks in your floor and furniture, power outlets, seams of your clothes, etc. Don't try to handle it yourself, get an exterminator ASAP. Seriously, you will regret it if you don't. Having bedbugs messes with your sleep and makes you paranoid for a long time. Do not take any chances.