Good day. I have lactogenic amenorrhea (son is 1 year and 7 months old…

Good day. I have lactogenic amenorrhea (son is 1 year and 7 months old). Ovulation was on November 17th (confirmed by ultrasound) and unprotected intercourse. Today is the 13th day after ovulation, for five days now there has been a pulling in the lower abdomen, herpes appeared on the lip. The test is negative. How probable is pregnancy? Today I took a hCG test, will it be informative?