Feel weird

It's been like 7 week going on 8 weeks since I had sex I have the arm implant and we used a condom not sure if it had a hole or anything but I've felt sick to my stomach my boobs started hurting a week ago I'm kinda bloated so the thought of being pregnant is bothering me. Then my older sister told me today she had a dream I'm pregnant  no one but a few of my close friends know I had sex.