When did she lock up last? This is my first year as well with dums although I have produced ball pythons in the past. My girls are a lot thicker bodied than it appears yours is, and I don't handle them during the breeding season unless I have no choice, so I haven't been lucky enough to catch a lump! I've been told that the lump appears a month or two after a successful copulation and it only lasts for a few days. My girls are both acting odd though. They are in perfect coils outside of their hideboxes. They have no interest in anything.
If you suspect she is gravid, it is in the best interest of the snake to not handle it as you could damage the embryos.
Good Luck!
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4.17 Normal ball pythons
1.0 Pastel ball pythons
1.0 Plains Garter
0.1 Normal Kenyan Sand Boa
1.1 Anery Kenyan Sand Boa
1.0 Mid-Baja Rosy Boa
0.1 Leucistic Texas Rat
1.2 Dumeril's Boa
-----My list is too long, so I'll stop here!
*Amy*