Pregnant??

Julia • Self employed leather worker and SAHM.
Facts:
We've been casually TTC for 15 months.
This month I used the Wondfo OPK sticks and pinpointed my ovulation. We got it on and used preseed for the first time.
At 8 and 9 dpo I felt light cramping in my low right abdomen. Implantation cramps? Never felt that before.
The past 8 months my boobs have been super swollen and sore starting 8 days before period, this month they didn't start mildly hurting til 4 days before period and they only hurt a tiny bit half the time.
Period is due on Tuesday 7/19.
Took a Wondfo pregnancy strip test yesterday and today at 11 and 12 dpo.
Both times the test looked negative until the 4 min mark (test says let sit no more and no less than 5 mins.
At 4 mins the line showed up just like this: 
AM I PREGGERS!?!?