Blood test positive, negative hpt at 12-13dpo?? Help

Sara

Hello, I had a positive blood test last week at around 8dpo. I've been feeling abit sicky and had heart burn. My breasts are sore which is unusual for me it's not something that happens before period turns up.

I've done a hpt yesterday and today, I'm around 12-13 dpo. They were both negative, starting to worry abit now. I had a mc back in August this was my first cycle back on clomid. Has anyone had this before? I'm having a scan on Tuesday, but I kinda wanna prepare myself for bad news. x