TTC but no sign of period.

Karis • 18 and pregnant🥰❤️

So I’m Karis and I need some advice on what to do, so I was on the injection for 2 years but I have come off it at the end of January 2019. I then started the pill for 28 days and at first I was bleeding but I carried on and then the bleeding stopped, I got to the end of the pill slip and was meant to have a period for 7 days on the 18th February 2019 but there was no sign in them 7 days, on 22nd February me and my boyfriend had unprotected sex, I have been doing some tests because I have been getting sore boobs, feeling sick then that comes and goes and a weird feeling on my left side of my stomach I have been doing some pregnancy tests but I have had no sign of that second line.