What should I do about in this situation?

yes you are coming on way to strong but it isn't too late. since you already made yourself a pattern of contacting her frequently she will be expecting it. good news that she cant be contacted while shes on vacation because i am telling you that she will think about you and be expecting a missed call or text message or something from you when she gets back. DON'T DO IT! us women like to be kept on our toes and your goal is to MAKE US THINK ABOUT YOU! give it a few days after she gets back to see if she sends you a message, if not then go ahead and text her asking how vacation was. she'll respond because we always like talking about stuff and then you say great, i'm glad to hear you had a good time or bummer too bad it sucked... whatever. leave it at that! if she asks how you are or initiates more conversation then she's interested, if not then i'd say it's a lost cause. but remember, less is more with girls. stay mysterious. if you give us a little...were going to want more. if you give us a lot, we get bored and move on. best of luck! be confident calm and cool. : )