Feeling overwhelmed!

Hey ladies! I need advice! So i just had baby number 5 he is only a few days old. I love him to pieces but im starting to feel overwhelmed bc hubby went back to work the day after we came home. So iv been taking care of all 5 kids myself during the day and most the night. And immediately starting back cooking, cleaning, dishes and taking and picking up my older 2 kids to school at different schools while dragging the other 3 with me by myself. I cant take anything for the pain bc its too much for me and causes the worst migraines ever (cant even move). So im in terrible pain, exausted, very irritable, and just want to crawl in a corner and cry. And today i have 3 sick puking kids to take care of to.....Oh and i have my boss on me about going back to work 3-4 weeks postpartum and i just cant do that! But she doesnt get it😭😭😭😭 IM SO OVERWHELMED AND EMMOTIONAL and idk what to do anymore!