Has the happened to anyone else?

Im struggling to find answers on this I keep getting faint positives but I’m not pregnant this has been happening since my d&c in feb and it’s not leftover hcg I had a scan to show there was nothing left over in my uterus! I’m so baffled and I don’t know what’s wrong! Has anyone had this happen to them for months? I’m going for a private scan on wed to see what’s wrong but I I already did this before in March and it showed nothing but a cyst on the ovary