Hi greeneggsandsam,
While all new mattresses will go through a break in period and there is also an adjustment period as well for any new sleeping surface … it would be unusual that there are any significant visible body impressions in a relatively new mattress unless it was defective.
Are they visible impressions that can be measured or are they just “virtual” impressions or soft spots in the mattress that you notice more when you lie on the mattress?
While the comfort layers in your mattress are not particularly good quality or durable materials (and I would normally suggest avoiding major brand mattresses … see the guidelines here) … even low quality materials normally wouldn’t develop significant impressions in two weeks outside of some minor settling of any fibers in the mattress.
Having said that … it would be reasonable to expect the materials in your mattress to develop soft spots or impressions much more quickly than a mattress that used higher quality/density and more durable materials so perhaps the fact that this is happening so quickly isn’t so bad since it gives you the chance to start all over again before your trial period ends to look for a better quality mattress that is more likely to maintain its comfort and support for much longer than the mattress you purchased .
This would depend on the depth of the actual impressions (whether they are very slight or significant) and on any symptoms you experience when you sleep on the mattress (pain discomfort etc) but in terms of quality/value I would certainly avoid major brand mattresses or any mattress where you can’t verify the quality of the materials inside so you can assess whether it has any weak links (which your mattress does) or make meaningful comparisons to other mattresses.
While there are too many unknowns, variables, and personal preferences involved for anyone to recommend a specific mattress for someone else based on specs (either yours or a mattress) or “theory at a distance” out of all the thousands of mattresses that are available in the market (see mattress firmness/comfort levels in post #2 here) … the mattress shopping tutorial is always the best place to start and has all the basic information, steps, and guidelines that can help you with “how” to make the best possible choices (and there would be many better quality options available to you in your budget range) … and perhaps more importantly, know how and why to avoid the worst ones.
Since you have the option to do so … I would consider starting all over again and looking in completely different directions and avoiding the major brands and the chain stores that tend to sell them.
Phoenix