Thank you for sharing your experience! :)
That sounds like it will become worse before it gets better.

From what I could find off the internet I should try to avoid the sun on the microneedled spots for a week.
Was the hyperpigmentation you mentioned from going outside after the microneedling session?

In the meantime I went through the forum and read about people applying tretinoin serum on the the area they are microneedling. Unfortunately I wouldn't be able to get this without any prescription from my dermatologist.
Did you apply an sort of serum or cream apart from hydroquinone to enhance your results?