Trying to conceive for baby #3!

I have tracked ovulation for the past 2 months and used test strips. This is our second month trying. We have 2 older girls but I haven’t been pregnant for almost 7 years. My period is due on Monday Oct 26th so according to my apps i am either 8 or 9 dpo. I took a test this morning and it was a solid negative. Am I testing too early?? Last month I knew it was gonna be negative because I didn’t feel pregnant but by 5dpo my nipples started hurting and since lastnight my whole boobs are soooo sore and I’ve had cramping on and off since 2dpo. I thought we were done because my husband was done after our second so I have been trying for 3 years to convince him for just one more so I know I’m being super impatient because of how long I’ve wanted this but I’m really ready to see a positive test again. 😔 Could I still be pregnant this month after getting a negative at 8 or 9 dpo??