Is there a possibility she could be pregnant?

So i had with my girlfriend a week ago or so, we used a condom every time we did it and we are really new to all the thing. I'm a really paranoid guy and i was wondering, when we had , sometimes when i pulled my out of her , the condom would roll upwards just a tiny bit I know you have to place it well before putting it in again and I know this is normal but I noticed during that there was this sort of fluid around the base of my , were the ring of the condom is. Is this the lubricant? Is this my pre-sperm and if it is, how did it get there? If the condom rolled up when i took my out, could the pre-sperm (if it is) get in her and get her pregnant. She's supposed to get her period next friday the 30th and she doesn't feel any of the early pregnancy symptoms what so ever, am i just being paranoid? Also i never came inside of the condom, every time we had , i took my off and *** somewhere else like her chest, etc. Please help me... Thank you