Waking every 2 hours! Help!

My 11 months old has started waking every 2 hours and and sometimes will stay up for a couple of hours in the middle of the night. She use to be a great sleep until around 7 months and it is just getting worse. We have had the same bedtime routine since she was 4 months old. Dinner, play for a hour, bath, play for 30 minutes, story and bed around 7. She falls asleep pretty easily and sleeps great for 2-3 hours and then the problems begin. She will wake up crying, We have tried everything, we try rocking her, singing to her, all our old tricks and nothing works. She will just scream and frail when we try anything, especially putting her back in bed. She doesnt do this when she stays at her grandma's or anyone else's place, just at home. She only naps once a day for about 1 1/2 hours. She isnt teething or sick. So we're just at a lost and were exhausted. Both my SO and I work and we both get up with her at night 😔 Has anyone else baby done this before? Is it just a really long horrible sleep regression? Any advice is appreciated.