Literally So Scared😩

Everyone please help me😢 I am very scared. 
On Valentine's Day my boyfriend and I were messing around and I might have gotten precum on my vulva or it was on his fingers and then he fingered me. From that day on I was terrified that I might have been pregnant because that happened a day before ovulation. Here I was on the 28th to find that I have gotten my maybe period. It is right around when I should get it and I had all the PMS symptoms..but now I'm scared. I was bleeding pretty regularly on the 28th and the 29th. I still was on the 1st but after that it died down. It never was super heavy and I never woke up to a bunch of blood on my pad. It has been a lot lighter than I am use to. Yesterday I didn't bleed at all until after gym class. I am really, really confused. It is on and off bleeding and it's bright red until I wipe, when I wipe it's pink. But when I do a finger check its red. Could I be pregnant? Honestly I am worrying so much I'm making myself sick😩 what is wrong with me??