Bedbugs with a baby and toddler - looking for hope and advice

Hi everyone,
I’m really struggling right now and I’m hoping to hear from people who have been in a similar situation and eventually managed to get rid of the bed bugs. I could really use some hope.

We’ve been dealing with bed bug bites since mid-June. We had a pest control company inspect our home, but they couldn’t find anything. On July 9th, we had a bed bug detection dog come in, and the dog alerted to bed bugs in our bedroom, our toddler’s room, the nursery, and the couch.
The frustrating thing is that we have never actually seen a single bed bug or any other physical signs of them. No bugs, no shed skins, no feces, nothing. Just the bites.

Around July 14th, we got rid of our old bed because we didn’t trust it anymore and it was also very difficult to monitor (black boxspring). We bought a new bed, moved it away from the wall and put interceptors under the legs. We’ve also treated the edges of the mattress and bed frame with DE. We do not have other options where I live.

Unfortunately, on July 18th, a pillow accidentally touched the wall once. The next morning, we had suspicious bites again.
Since then we’ve completely steamed the bed and put our pillows and pillowcases in bed bug-proof encasements.

Our 5-month-old baby sleeps in a bedside crib next to us. We steam it every week and it’s also on interceptors. Our toddler sleeps in our bed with us. We got rid of his mattress and thoroughly steamed the wooden bed frame.
We’ve also applied DE along the baseboards, around electrical outlets and wardrobes, and into all the cracks and crevices of the couch.
And yet… we’re still getting bites.
Not every day, but every few days.

We unfortunately don’t have the money for professional treatment, and honestly, I am completely exhausted. Having a 5-month-old baby and a busy toddler is already challenging enough, but dealing with this on top of everything else is becoming unbearable.

The hardest part is my toddler. I feel awful constantly having to tell him he can’t take toys from his room downstairs or play with certain things because I’m scared of spreading the bugs.
I’m wondering if anyone else has experienced something similar.

How did you deal with bed bugs when you had young children?
Did you manage to get rid of them without professional treatment? How long did it take?
I would really, really appreciate hearing some success stories. I’m at the point where I desperately need to know that this can actually end.