Thrown off pH‼️‼️‼️

Me and my man had unprotected sex on Tuesday and I noticed my pH is off. I’m 1000% sure he’s not cheating or anything. I haven’t been eating the best 😬 and I know that can affect your pH too. I just wanted to get feedback as to why it may be. He did the pull out method and believes he pulled out in time. Is it possible that maybe my body is just not use to having anything in there (we haven’t had sex since early September)? This isn’t the first time something like this has happened before. I don’t masturbate so nothing goes in there until we see each other. Help!!!