Excessive incorrect flossing can cause the following:
1) gingival tissue trauma
2) inflammation
3) periodontal ligament (PDL) trauma
4) PDL attachment loss = gingival recession
Incorrect flossing can cut right through gingival tissue as well as PDL, this can cause bleeding, pain and introduce microorganisms into blood (bacteremia) which can cause inflammation.
The spaces between your teeth is covered/filled nicely by gingival tissue called gingival papillae in health. If you noticed that the spaces are getting wider and more obvious, then one of the following may be the cause:
1) gingival papillae destruction due to chronic inflammation (lack of oral hygiene)
2) gingival papillae apical migration due to PDL trauma and/or loss of PDL attachment (lack of oral hygiene and/or mechanical trauma)
3) mechanical trauma such as frequent incorrect flossing
I believe that in your case, if in fact that your dental papillae is receeding causing a bigger space, then it's probably due to your frequent obsessive flossing. Even when I try to floss gently and correctly, at times I simply slip when my floss breaks the contact (where two teeth touch) and cuts my gingiva.
I truly believe that you should cut back your maximum flossing to twice a day, but usually once a day is suffice and recommendated if done correctly. Is it possible that the "gaps" between your teeth have gotten bigger due to your frequent flossing? I say yes.
[DISCLAIMER: I am not a dentist (only a "wannabe"), at times I really don't know what I'm talking about.
Perhaps an upperclassmen and current practicing dentists can further inform you]
