Am I having a chemical pregnancy

Hey girls need advice. I think I'm having a chemical pregnancy idk I've never had one. So my period was from February 3-7. And my next period was supposed to be 9-12 days ago. I'm having pregnancy symptoms but only have had one positive test and it was faint and a few very very faint lines. If it is a chemical when should I expect bleeding. March 11 I had what I thought was implantion cramps since I had no bleeding and have been having cramps off and on since then. My boobs hurt. I've had craving. More tired. Can some one help me. I can't get seen for like a month.