loved it, at first

For reference- I am 5'3 120lbs and sleep alone. I loved this topper at first. I found it cozy with adequate support, and I was no longer waking up hot. However, two weeks in, it was completely flat where I slept so I flipped it. Two weeks after that, I experienced the same thing, so I rotated it this time, and that was only semi helpful for a week. Also, each time I adjusted it, or changed my sheets, I noticed yellow/orange discoloration that got worse and worse. After just two months of use, I trashed it. I have many products from Serta and this is the ONLY item I've had a negative experience with.