My wife  is taking pills from past 2 months to prevent pregnancy she has taken 3 pills within 2 months the period cycle has been effected and we are scared whether she is pregnant as i have googled it and found out that it happens when pregnancy about to occur and whether intake of further contraceptives pills is good for health or not as already there is a weakness in her body and we have not planned for a child atleast for a year please provide suitable solution for the problem.i'll be very helpful...