<human>: Me and my girlfriend have been together for 7 years. We don't see each other much often lately due to opposing work shifts. Plus she's been coming home late most of the time. 

Because of this, the sex has been quite infrequent and has been rather tame mostly on her part. 

Growing suspicious, I snooped around her purse and found a pack of Gestodene with 5 pills taken. I immediately regret this action and I don't know what to do or how to confront her about it. 

I left it on her nightstand right now and am waiting for her to come home. What should I do?

Can you give me the gist of the text in a nutshell?
<bot>: Girlfriend is acting peculiar and the sex hasn't been great lately, I grew suspicious and found some used pills in her purse.