Abortion question

I had an abortion aug 5. And I had sex with my boyfriend aug 16-today well last week my eyes got really bad like when I was pregant before and I've bled on and off but never a lot or enough my body feels so crazy and I was just wondering if I get a pregnancy test today will it show correct results or should I wait ? I really know my body so I do feel like something is up also is it possible to get pregnant that quick after an abortion ??