Pregnant or no ?

I already have 1 child. I'm scared that I might be pregnant again (scared because I was on vacation when I had sex with this guy on April 30th). I got my period May 13th and it ended May 19th. My highest chance of getting pregnant was on April 28th. I got my period again on June 13th and it's already almost done (June 17th). The thing is that I feel kinda weird but I am thinking that I've been just bloated or constipated or whatever. I actually took a pregnancy test 2 days ago and it said negative.