Building on the excellent advice @Lindagaf has given you, you could actually proactively contact your AO now and explain the grades/report card coming their way.
It might be a very good idea to explain how homework got away from you due to the family situation and in retrospect you now realize you should have contacted your teachers and GC to explain the situation before it had such an impact on your grades. Furthermore, you will be taking this experience as a life lesson on how to deal with situations like this going forward and will definitely be more proactive in college with such a clear experience showing you how not to handle it.
edited to add: I wouldn’t try to blame this on senioritis. Saying you just chose not to complete the work isn’t the explanation anyone wants to hear when seeing a subpar report card.