What Is The Correct Time To Test For Pregnancy After Missed Periods And Pregnancy Symptoms ?

In January I started my periodbetween the 4th-6th and it lasted about 5 days, in February I started my period between the 4th-6th and had unprotected sex on the 20th of February. I felt the pains of ovulation on the 22nd. Every time never fails I start having tender breasts and moodiness a week before I start but it never came before March. March 3rd I felt light cramping once a day for 3 days, no period, then starting the 8th my breasts started to hurt and swell and I've been very tired and unmotivated. Negative HPT on the 8th. Is it too early to test or am I probably not pregant?