Feeling alone

Hi yall, about a year and half ago my husband and I discussed quitting my job since our 15 yr old was diagnosed with Type 1 Diabetes, we also have a 13 year old as well. Lately I feel alone, my husband works 40 hours and all he wants to do is come home and play video games (which is fair he works) but I get up at 4am to wake the 15 yr old up for band practice every day during the week, when my husband has his 2 days off he refuses to wake up (he's usally up all night playing games) and take him. Lately I've been pulling all the weight, chores, all 3 of their laundry, taking care of our sons type 1 as well and I get no sleep, I don't eat and my husband and I argue alot because I told him I am alone and need some help every now and then with the kids. Am I over reacting for wanting a extra hour once every 2 weeks of sleep? I do not mind doing absolutely everything but our 2 teens don't help and argue (ya know teen things) and my husband feels like another child, he goes to bars with friends, gets alone time without everyone and I just cant mentally do it some days. So that being said am i over reacting or is it valid?