Need opinions.

I'm 10dpo. We've been ttc and now I have all kinds of symptoms like sore nipples (had them for 3+ days) twinges in my abdomen and last night I went to brush my teeth like normal and the tooth paste burned so bad! It's the kind I always use. I took a wondfo pregnancy test the one with the blue handle and it gave me a bfn. I'm wondering if these are in fact pregnancy symptoms and if I should go spend the extra money on a first response test. I never have any AF symptoms so I highly doubt it and AF isn't supposed to come until the 4th