I usually get my period every month on the 21st, It’s now the first and I haven’t had my period — just a light spot in my underwear.

My breast have a dull ache, I’ve been slightly nauseas before and after eating and I have cramps on one side that feel like an ache and then they go away.

I took a clear blue test this morning but it says not pregnant and it took 1 minute to come up. Has anybody used clearblue and it was negative? I’ve taken a first response before in my first week of pregnancy and it turned out negative. What brands should I try? Should I retest?