My nipples tingle,pelvic pain,missed period 1 month,slight morning sickness,feeling tired and cold,negative preg test????

Normally a home: pregnancy test will be accurate when you are full month late on your period. You can repeat. Reasons for missed /late periods: low body weight, obesity, marked weight gain or loss, over-exercise such as in endurance athletes, breast-feeding, stress, illness, eating disorders (bulimia or anorexia), travel, hormone irregularities, drug use, medications (i.e., birth control) or med problem (PCOS)