Pregnancy Scared.

Patient: Ok, I’m 20 years old and I lost my virginity on the 7th. Well when my boyfriend cummed a little bit of sperm touched my vagina lips. it touched the left side of the vagina lips. My question is could I get pregnant ? also My vagina has been hurting every time I pee and I only pee a little. I keep going to the bathroom too. Why is this happening ?