I need to give up😔

Lily
I'm around 21DPO, I had unprotected sex the day before ovulation last month, I truly thought I was pregnant. Then, on the 2nd of July, I started lightly bleeding. I got excited, I thought it was implantation bleeding, even though my period was due the next day. Well, it's been five days now of bleeding and I still think I'm pregnant. I've taken pregnancy tests which say negative constantly, but I still think I'm pregnant. Why? Well, I know that implantation bleeding has lasted 4-5 days before for some people, and this period has been so different from the other ones. Normally I have a very heavy flow, this month it's been very light and medium, I've barely felt any blood come out at all compared to every other month when it practically floods out.
But, I'm not pregnant. I'm on my period, I'm not pregnant - but what if I am? Ahh it's just so hard to make myself believe that I'm not pregnant at all. And I really need help to convince myself and get tips. Please help me get over this😔
My temperature has been unusually high this month and I experienced a dip and then my temperature went up again which is why I really think it's implantation, but it's not, I'm not pregnant. 😔😢
Whatever you can do guys, just make me stop believing that I'm pregnant :(