Hello! I Am A 16 Years Old Teenager. I Am

Hello! I am a 16 years old teenager. I am also a virgin. It's been two month since i had my period. My aunt and her husband were over at my house for 3 weeks and I had given them my room since it was the guest room from the start. After they left, I think that our maid forgot to change the sheets after. I read on the internet that this may cause a case of pregnancy if some sperm were on the sheets. Two days ago, i noticed some drops of blood and thought that my period is starting soon. But nothing happened and there is no sign of a period. I also read that this maybe due to a fertilized egg. Please help me i don't know what to do