Ttc please help

I took out my iud may 15 I bled on 16 and 17 lightly which I figured was normal hormone change then may 29 I bled heavy like a real period so I used that as fdp so I used the ovulation calender and tried the week ending the 13 since then the only abnormal thing ive been experiencing is really bad soarness in my boobs that dont even let me sleep I have 2 children and never went threw tender boobs with them I tested negative yesterday june 20 just to be curious could I be pregnant or is it to early to test please help iam anxious