Pregnancy tests

My last period was 8th of May. So should be 5weeks 6day. I had miscarriage before getting pregnant with my little boy who is now nearly 6. So I’m pregnant again I had miscarriage in January. I’ve done 2 cheap digital test which both came up pregnant also don’t cheap £1 normal line test then all had line was light then control line. I’ve gone 3 clear blue pregnant test all of them have came back no pregnant anyone else had this its so annoying as so want another baby