Clear blue plus

Michelle
So yesterday I did a clear blue plus test and could definitely see a faint line to show a positive so went and bought two more while waiting to take second I noticed some bleeding so thought period was beginning I did  the second test and same thing with a very faint positive same as before woke up this morning and took the digital clear blue which said not pregnant but I don't know because other two definitely had a faint positive? Anyone else has this with the clear blue plus? Still bleeding also but did have a period with both my first two children at start of pregnancy?