Is it possible to reconcile sincere repentance with the desire to have children, after a series of sins and suffering in the current marriage?

You have committed great transgressions and grave sins. Sincere repentance erases sins and removes their traces. The statement that Allah will not bless you in your children is a saying without knowledge and an audacity against Allah. Improve your deeds and increase in righteous acts, and beware of falling into tribulations. If your first husband divorced you and your waiting period (iddah) expired, then your marriage to the second is valid. Otherwise, your marriage to the second is invalid and must be annulled. If your current husband smokes hashish and mistreats you, advise him. If he does not repent, then good may lie in separation from him, so seek divorce from him.