okay so on Friday me and my boyfriend did NOT have sex we never have.. but he did rub his penis against my vagina neither of us had pants on... it wasn't the tip.. just the penis in general was rubbed up and down against my vagina... he did not cum and he did not go inside of me. he may have precummed and I've done research and it says pre cum had dead or no sperm in it.. plus we only did it for about 2 minutes .. I'm stressing a lot about it and my period is a day late and my discharge amount has changed and I don't get as much anymore and is kind of worrying me... My stomach also has a weird feeling lump in it and idk what it is but my dad says it's a sprained muscle. PLEASE help me because I'm so stressed even though the likely hood is very slim please share your thoughts with me.