Got a "weird" gut feeling about LTR. I trust but verify and a good amount of the time my gut is wrong.

Example: catch her 'hanging out with dudes' - she posted something on snapchat with nonspecific men in the background. Turns out those men were my friends and they were all together setting up a surprise party to congratulate a milestone in my career. Felt like a massive dick for being distrusting in this scenario.

How do I reign in inaccurate gut feelings without also weeding out the "good ones" that tell me she's up to some shady shit?