I think this is just normal for you. I went through something similar. I also measured because I will lose weight OR inches, but not both-especially if I exercise. I am a smaller size now than the last time I weighed this. Don't despair! You can see where there are many weeks I lost NOTHING in weight, but did in my inches.

Date weight waist
20-Sep 160 36.3
27-Sep 157 36.3
7-Oct 154.5 35.7
11-Oct 153 35.3
20-Oct 153 35
25-Oct 152 34.5
1-Nov 150 34.3
8-Nov 150 34
17-Nov 148 34
24-Nov 146 34
30-Nov 146 33.5
6-Dec 144 33.2
22-Dec 143 32.5
2-Jan 143 32
13-Jan 142 32
27-Jan 140 32
31-Jan 140.5 32
8-Feb 139.5 31.8
14-Feb 138.5 31.5
22-Feb 138 31.2
2-Mar 138.5 31
7-Mar 137 31
14-Mar 136 31
21-Mar 137 30.8
29-Mar 135 30.6
5-Apr 135 30.5
12-Apr 136 30
20-Apr 135 29.8
28-Apr 133.5 29.2
2-May 132.5 29
9-May 133 28.8
16-May 130 28.5
24-May 130 28.3
30-May 131 28.3
7-Jun 133 28.3
13-Jun 130 28.1
20-Jun 130 28
28-Jun 129 28.1
6-Jul 129 27.8
12-Jul 128 28
19-Jul 126 28
26-Jul 126 27.8
2-Aug 127 27.6
9-Aug 125 27.5