am I just stressing myself out?

So period is due in two days and I did this through the fertile window but I'm not anymore/can't tell weird or no? I'm asexual homoromantic so there is so way I am pregnant. But today I have been feeling off. I Googled it and said pregnancy was the common thing for my symptoms. I don't know how I would be. But I'm stressing out about it and I know that if I stress myself out too much it won't come (period that is) I also haven't been sleeping. I have some pictures of my stomach sorry about the scary my cat. tell me what you think please !