Hi, I Am Currently 7 Days Late. I Took 2

Hi, I am currently 7 days late. I took 2 first response tests and both are a +yes. I recently started taking methyl cobalamin B12 supplements in the form of an oral spray. I used to get injections for low b12 but wanted to give this a try. Can this make my period late and give a false positive? My husband read that specifically this organic spray b12 has given false positives from other articles he read. Thanks!