I dealt with those damn things in 2012 and it was a royal nightmare for me since I was allergic, but I did get rid of them.
I agree with the suggestion of diatomaceous earth (DE). It's pretty cheap and you need very little. I dusted all over my room, but mainly in cracks and crevices, plus I put it in all the folds of the furniture. Unless it gets wet, it's good forever because it kills the insects by cutting their exoskeletons and they dehydrate and die. Works for fleas, roaches and other bugs, too. Make sure whatever DE you get is food grade. It will say it on the packaging. Don't get the stuff for pools because it has chemicals in it that should not be used inside. DE is exceptionally safe, but wear a really good mask when dusting since you should not breathe it at all.
I bought a special mattress and box springs encasement because I refused to get rid of my bed. They are not the cheapest but do work to keep them from living inside your bed. (Well, technically if they are there the encasement traps them inside and they are not able to get out, thus they die of starvation. Bed bugs don't have chewing mouth parts so they can't chew through anything.)
I personally would recommend getting someone to check into it. Some exterminators will do so for free. BUT, I do understand where you are coming from. I don't like anyone in my house or in my space and I do not like upsetting news. But, these things don't go away on their own. I'm not trying to freak you out or upset you, but please be aware if you do have them and decide to sleep in the couch instead, they will find you since they are attracted to your body heat and the carbon dioxide you exhale.
Ultimately, I was able to get rid of mine by using food grade DE and encasing my bed. I ran all my clothes through the dryer on high for at least a half hour, then bagged and sealed them. (They MUST be sealed with no way in or out of the bag). For whatever could not go into the dryer, I bagged and sealed my possessions rather than throwing anything out. It was a time consuming, annoying process, but I had a serious reaction to being bitten so it was worth it.
Good luck and I hope you don't have them.