Pregnant?

Ok so I'm having a lot of symptoms of pregnancy but I still have 11 days till my period but my problem is that my boyfriend and I have only been together 4 months.. We talk about marriage in the beer future and kids some day but I don't know how he's going to react if I am. We're both 20 working good jobs and we are very much in love. So ladies what do I do? Or how do I tell him if I test positive?