Oh honey it's going to take longer than that.
I can't remember for my first (vaginal birth), but after the second, a C-section, it seemed to take forever. My baby is now 9 months and I feel like my tummy is pretty much back to normal (I just need to start working out again to really get it back to bathing suit condition, ha!)
I resented my c-section for many months because I felt it made my stomach extra bubbly feeling and things were all jumbled up and just not 'tight' in there. Ugh. I didn't remember having that feeling the first time, so it may be second pregnancy effect. But I blame the c-section.