HELP preg maybe?

Hey ladies so I’m on the pill so my bf isn’t exactly trying to avoid pulling out, and I’ve been pregnant before but unfortunately had a miscarriage, ivebeen having a lot of the same symptoms plus now random puking, I took a clear blue digital last night but accidentally misread and only dipped the stick for 5 seconds instead of 20 and it said not pregnant. Im supposed to get my period in 2 days but I’m freaking out now... can someone give me some clarification? Will the test say negative if I don’t dip the stick for long enough?