Burnout is real and I'm not okay

Working full time, 7yo, 5yo, 2yo. Wife had to go back to work 6 months ago after mat leave. I'm the one handling school pickups, dinner, bedtime routine most nights. I love my kids but I also feel like I'm drowning. Haven't worked out in months. Haven't had a conversation with my wife that wasn't logistics in forever. Last week I cried in my car in the parking lot for 15 minutes. I know I should talk to someone but when? Is it normal to resent your kids a little bit even though you love them?