Is there some way loose denture can be made stable enough to eat with properly?

Q. Hi, I have had a top plate denture for some years and a bridge across the front 7 or 8 teeth on the lower gum. However, for some years I have only had 2 or 3 of my original teeth left in place. Eventually the lower gum became so worn that part of the root became visible, and needless to say I picked up infection after infection. In January of this year following another infection, I visited my dentist who told me I would need to have the bridge and remaining teeth removed and a full set of dentures made. I expressed my concern around being able to keep the lower denture in place, but despite this my dentist assured me that I would have nothing to worry about. I needed him to reassure me several times before agreeing to the treatment. This work has now been done, and guess what, no matter what denture adhesive I use, the lower denture comes out every time I eat. Clearly my gums have worn away over the years (I am 59 years old), but cannot keep going with a denture that continually becomes loose after 2 or 3 hours or every time I eat. Also, I find it extremely difficult to get used to this lower denture as my mouth always feels full of a foreign object. I would like to know if there is some way to either fix my lower dentures in a way that makes them stable enough to eat food, or some other alternative. I realise you would probably need to examine my mouth, but can tell you now that much of my gums have worn away over the years. Is there any possibility at all that something could be done? Many thanks,