Started Student Teaching, don't know how I'm gonna make it.

I'm a 22 year old dude who's going into Music Education in the USA and I just started my student teaching. I'm only going into week 2 and I already just don't know how I'm gonna make it. I have a 9 weeks with Elementary and 8 weeks with Middle School schedule for the semester. The Middle School part will probably be ok, as it was originally moreso what I was looking for. My college requires I do elementary teaching as well, so I have that first. The school I'm placed at is very rough, though my coop is a generally nice guy. The thing that's killing me is I feel like its all going too fast. By week 4 or 5 I'm expected to be planning and teaching every lesson for the whole day for the remaining weeks, which I can't even fathom. I hate lesson planning and it's something I struggle with, even without the very overstimulating elementary kids. I come home every day feeling completely spent and have been sobbing consistently in the evenings afterwards. I don't know if there's any advice that could help, but I don't really have another option. I have to graduate at the very least. My coop is nice, but I have a very strong feeling asking to slow down would not work and they wouldn't adjust that for me. Is there anything I should do besides just survive for the next few weeks?