Worried..miscarriage??

So my period is 4 days late today and I’ve done 3 of these hcg tests and got very very faint positives on all of them. Today I’ve been having some period type cramps and some light blood when I go to the toilet, it’s not much but it doesn’t seem to be going away. Is it possible that all three tests could’ve been false positives? Very worried that this could be a miscarriage as I definitely feel pregnant. This is one of the tests I did -