I need help

So I’m 14 about to be 15 and I started having sex with my boyfriend about 3 weeks ago and we had sex the day of my period and he didn’t use a condom we have had sex 4 other times since then 3 without and 1 with but we took it off before he came I was looking at the home remedy pregnancy test things and I did the salt and Urine one and it came out positive what should I do should I tell him and go get a test or should I not worry I need help omg