Help plz

My period is on day 2 of being late, my boobs are ridiculously sore. I keep having a weird cramp in like the middle of my stomach, last week it was cramping on my left side. Aside from that, TMI I’ve been super gassy! I took a first response last week and it was negative. I’m trying to be patient but is there any way I tested too early? Should I test again if I don’t get my period?