is he cheating

basically the other day we was round my parents and my phone run out of battery so I asked to use my partners phone and I was on Google and in the drop down search engine It said escorts in and then he put are home town, I ignored it pretended I didn't see anything, we have 5 month old baby and I've been suffering from postnatal depression and I'm also on anti-depressants that's been making me little paranoid so I'm all over the place, I don't want to talk to him about it I think it's just easier to pretend I didn't see anything, but he can clearly see that I'm angry with him and keeps asking me what's wrong, I'm scared to mention it and then I loose my family, I don't want to be a single mother, but I find my self reading his messages and going through he's phone and I don't think I can keep living like this, i don't no if I'm just making a big deal out of it or not, we've been together for 7 years I trusted him and now I'm lost at what to do, advice needed