I took the mini pill 4 days before sex two day later i started bleeding is there anything to worry about it is some doctors say 7 days before sex ?

I don't think so: The key to your question is, "Was this your first cycle of the mini pill?" It is recommended that you use some back-up contraception such as a condom during the entire first cycle you are on the pill....it gives time for the hormones to kick in and suppress ovulation. After that, you only need condoms for ST infection prevention. Very unlikely to be pregnant; REALLY hard to get pregnant at 50!