So I'm 6 days late

Hello ppl my period was due 4/28 and today is the 5/3 I'm 6 days late and 10 home perfect test which all come back bfn +blood bregnency test  which my doctor took yesterday u was allways on time 27 cycle I'm 43 been ttc 5 months I feel every reason to be perfect nause tired feel sick this is my 3 child so I know how it feels any body happend something like This I don't know wat to think I'm confuse no period no bfp wat is going on maybe I'm old