Your chances of fighting it are 100%. Your chances of prevailing after fighting it are slimmer though I'd hesitate to make any predictions other than >100%.
If you choose to pursue this through trial you're rolling the dice. You may be convicted or may not. The way that your can contest her evidence is your attorney can contest the evidence and move to have it suppressed, if there is cause. If the evidence is not suppressed then the jury will see the photos and the statements and your attorney will have to convince them that your ex isn't credible and you are. Those are your options if you choose to fight it.

