as long as she takes the pill everyday, you guys dont need to worry about getting pregnant. and watch when you guys do have sex around the time she does start her period. also take the pill around the same time everyday. it helps a lot.
Well, she can still get pregnant. I have had 4 friends, 2 which were on the shot, that have all got pregnant. They took it every day, never missed. One of them never had her period and didn't know she was pregnant until she was 7 months. All you can really do is wait it out, believe me, i hated when someone told me that, but there is nothing you can do until she misses that period. I hope this kinda helped, best of luck to both of you.
She should try to take her pills around the same time every day, I think this helps efficiency. I would say if it were the first month of her taking the pills to use a back-up method, but she has taken it for at least two months, so you should be OK.
The pill is a really effective method of contraception so she is most likely not to be pregnant, there is only a tiny number of unfortunate cases in which the pill dosen't work. You shouldn't worry