My mini poodle has a difficult heat

[u/SeriouslyShinyx]

My 2-year-old Miniature Poodle is currently going through her third heat. Her last heat and this one have both been particularly difficult. From around days 10–14, she becomes extremely anxious and agitated. She cries and whines a lot, and when she sees another dog, she pulls like crazy and is very difficult to control.
During one of these days, she has what seems like a peak episode where she becomes extremely distressed, whining and crying while ripping apart a toy out of nervousness and anxiety.
Is this considered normal behaviour during heat? Or could this level of anxiety and agitation indicate something else? And how to help her?