Anxiety and Depression after birth of third baby

Hey everyone. I recently just had my third baby he is only a week old. I have a 3 1/2 year old and a 17 month old. Obviously my third was not planned but I am grateful and in love with my bundle of joy. As you can tell my kids are very close together which is very hard. It’s been a tough transition that I know with time we get into a schedule and a routine. But I can’t help but feel very sad because I just feel exhausted dealing with a newborn at night and dealing with my toddlers during the day. I have help but it’s still so hard. I also feel so lonely. My mom lives three hours away and is not able to come often. I also don’t have many friends and neither of them have more than one kid so they can’t relate. I can’t even talk to anyone, not even my mom, because everyone tells me the same thing. “You should have waited,” “three kids are too much,” “you chose this.” I just need someone to tell me they can relate and can give me some sort of advice to deal with this. I really try and stay positive because I’m so blessed to have three amazing, beautiful, healthy babies that I adore so much, but I just can’t help feel sadness and so much anxiety.