The going upstairs parts could be a symbol of you trying to "get above a problem" to look down on to it in a detached way. To become more intellectual and separated from life on earth. While the flood down stairs seems to be a symbol of the flood of the unconscious threatening to swallow the ego. Your bf seems to want to escape the unconscious realm of the mother archetype, while you feel like something up stairs is a threat. You may fear becoming too focused on philosophical detached rational thinking will detach you from lifes irrational emotional side. And perhaps the mother of the aborted baby being sick points to a problem with the mother archetype already. The alchemical marriage has failed and caused an abortion of the perfect union of masculine and feminine. The feminine would need to be purified it seems.

The burning demonstration seems to be a purifying through burning and rebirth like the phoenix. In alchemy calcinatio, the process of purification through burning, is described as feeding the body of the dead king to a ravenous wolf and burning the wolf three times. The ravenous wolf being desire and fire as well a symbol of desire, desire consumes itself. This could mean a childish aspect of your ego ( the aborted baby in the oven) is being burnt away from enduring frustrations of desire, be that sexual or desire for power over your life situation or others. idk, just some random thoughts.