he tells me he loves me all the time and that I have made his life complete and me and the ds' s are his world.
Were it not for this I would echo Cogito. This aspect of your relationship aside, how does he show that love? Is he in every other regard thoughtful, supportive, nurturing?
Unlucky circumstances regarding both pregnancies affected your relationship with these partners. Second time around there was the added pressure of the memory of your ex H, so please don't think of yourself as selfish or needy or inadequate. You say he only has sex with you after you have begged him which really doesn't sound healthy.
Are you sure that you both had a very high sex drive?
I stopped making any effort myself with foreplay etc (he never has anyway) That sounds worrying, were you his first serious partner, was he very inexperienced?
If he doesn't have another outlet ie nobody else is in the picture and no major porn habit, and if he isn't under other stresses, it seems a big change in 3 years.
Touching and massage should be possible even if kissing is off the agenda. Pretty soul-destroying being used a blow-up doll (sorry OP) when he feels the urge to get what he needs and then to carry merrily on with his day. Very one-sided, I am not surprised you feel rejected.
As you sought dental treatment, so he should get along to see his GP, get his health checked out. A grown man in a loving relationship shouldn't be embarrassed to discuss intimate subjects with his partner. If all is physically well then see how you feel about going to counselling together.