This could be one of those difficult periods that ultimately turns out to be a boon for your relationship, even if it doesn't feel like it while it's happening. Old issues and resentments are coming to the surface now, and you're both feeling the tension that results. Power struggles are likely; one or both of you could really start feeling possessive or even jealous of the other's time and attention, and you won't know how to calm yourself down or talk yourself back into some sense.
All you might know how to do is to follow your impulses and lash out, starting arguments and creating hurt feelings. That's not the best way to deal with the current energy, of course. Your best bet might actually be to avoid conflict altogether, or at least to talk things out calmly; but is that possible? Maybe not just now. Thank goodness this period only lasts ten days! In a week or so, you'll be able to discuss things a little more rationally, but for now, don't expect too much out of yourselves or each other along those lines. Do try not to get into anything heated with each other, though. It's very likely that you're creating a mountain out of a molehill, and a little time and perspective will reveal the truth.