My Girlfriend Has Been Feeling Ill Lately. We Didn't Have

My girlfriend has been feeling ill lately. We didn't have sex but I did give her oral and fingered her. I don't believe that I had precum on my hand. The sexual activity happened on July 26. She got her period on August 7th or 8th I believe. She's been 14 days late for her period. Today she noticed that she started her period. She claims that she didn't feel the blood but she noticed it. She's in a lot of pain, more than usual she claims. Her symptoms are sweating, chills, nausea, and fatigue (going up stairs makes her feel breathless). It may be due to stress but I don't know. She may be overthinking it but she says that she feels pregnant. She's never been pregnant before. Is she pregnant do you think?