Please help - is it real or an evap?

Hi, I’m approximately 12dpo and have had really sore breasts for a week, and I got what seemed like a cold at 8-9dpo which has now gone, very lethargic but no implantation bleed that I’ve noticed. I just took a cheap hpt and got this result within 1 minute. I’m just not sure if I should believe it as I’ve only just been told a month ago my left ovary has a large cyst and it’s no longer producing eggs. I’m probably being over cautious but I just want some other opinions before I tell hubby. Thank you :)