false positives?

Confused as what to make of this.  AF suppose to start yesterday but cycle have ranged from 28-35 days with average around 30. Didn't think too much this month...def BD around fertile week but didn't track ovulation with temp or sticks. If I had to guess 4-5 DPO woke up at 4 am nauseous and vomitted a few times that am. Have been fine since just belchy which I never am. Started testing this week after getting some tests at dollar store: Veriquick and Accuracy. Monday (5 days before period)- BFN. Thursday- negative at 3 min so walked away. Prob 20 min later came back and saw pink line. Not sure what to make of it. Repeated it along with accuracy test (pink) that night-negative at 3 min so went to bed. That am-faint line on veriquick. Repeated veriquick that am (so day of AF) -same thing- negative at 3 min, came back 30 min later faint line. Today, used 2 first response -negative. No sign of AF. Just want to know either way so I can move on!