Early Symptoms of Pregnancy?

My husband & I decided in February enough waiting & to start TTC. I've been off of birth control since Christmas & my body's adjusted to not being on it. Ovulation occurred near/around 3/11-3/12. I've been having right ovarian aching pain (got ultrasound, all normal) since about ovulation. Within the last 10 days, my breasts are very achy/tender on the sides and underside; not too painful, just different. AF is due on 3/28 (32 day cycle). Is the breast discomfort normal/a good sign I may be pregnant? Also, how soon is too soon to take a test? Took one last Monday 3/20 & it was negative. Thank you all in advance!!