Oof, that sounds miserable. I am not a doctor, and this is not a forum for medical advice, yet that report sounds like it may be worth talking to a doctor, if it is disruptive to normal sleep.
There are myriad, innumerable causes for problematic sleep patterns in little ones, a lot of which involve situational/circumstantial stimuli around lights/screens, sounds, food, activity, etc., and others that require treatments and therapies. Best to communicate with a real human with expertise than randoms on the interwebs about this.
That said- having had one kid with what a doctor explained to us was "night terrors"- the manifestation we saw was different than what is described.
Rather than waking up with a normal cry every 5-10 minutes, night terrors for us looked more like an experience of ABSOLUTE TERROR in our little girl. A sudden onset with the most awful, terrified scream, where it seems like the poor kid is being tortured, or in so much pain, and is absolutely unconsolable, not even reachable. It is awful, awful to see.
But then after a few minutes of pure terribleness, it subsides and she falls asleep like nothing happened, and generally doesn't wake up again, and is unaffected in the morning. The parents, however, are scarred. :)
We understand there are different manifestations, but the key in them is the term "terror." It is a categorically different experience than even a pained/hurt cry- though as the doctor explained, as far as we know there is nothing "wrong".
Thankfully, the one girl who had these grew out of them, though interestingly as she got older she also occasionally exhibited sleepwalking, with her eyes open, during which experiences she was sometimes crying/whimpering as though scared.
When this would happen we developed some techniques to bring her "out" and then she was fine, had no memory of the experience, and was able to go happily back to sleep.
The one physical phenomenon that we observed as a correlative trigger was that she often had to go to the bathroom pretty urgently. I am a software guy and would think of these incidents as though part of her cognitive machinery was responding to that signal, but part of it was not as it should, hence the fear- like something was missing. Then all fine once she was fully awake.
In any event, good luck.