I don’t know what to think..

This was my fourth miscarriage. I was supposed to be ten weeks but lost at 6 weeks. I opted for the D and C because my body wasn’t doing it on its own. I had my D and C on August 29th and bled for a month straight. They just checked my blood and said my hCg is at a 17. She said either I’m pregnant again or there could still be something up there. My fiancé and I had sex exactly two weeks after surgery and two days later I got what I thought was my period. I don’t know. This one was rough physically- not even so much mentally because I’m just so used to it at this point. I don’t know if I got my period, I don’t know if I ovulated. I have no idea what’s going on. I’ve never had this issue before and I’ve been in and out of the doctors office since the beginning of August when I first found out I was going to miscarry. They told me bleeding for a month was normal- not for me it’s not. Tried to tell them that but they basically brushed my concerns off as if they were stupid. So now here I am wondering if there’s any possibility I could be pregnant again- even though I bled after the one time we had sex. I took a pregnancy test last night, negative. Now I just took one and I gotwhat I think looks like a shadow of a line.. can someone help me?