Hey mama, welcome! Honestly, one week is super early pa, most pregnancy symptoms don't show until maybe 10-14 days after ovulation, kaya what you're feeling now ay most likely PMS na, lalo na kung fertile window lang talaga yan. The withdrawal method isn't the most reliable kaya I'd suggest getting a pregnancy test around 12-14 days from when you had sex para mas accurate (or better yet, check with your OB para sa peace of mind), but for now don't stress yourself too much, your body might just be playing tricks on you! A few of us tried the same thing before and palaging ganyan ang worry, pero usually PMS lang pala. Rooting for you, whatever the result!