I am married since 5 years but till now I didnt...

General advices to increase your chance of getting pregnant ?
1make sure to do the sexual intercourse during the ovulation time to increase the chance of getting pregnant 
 performing sexual intercourse many timeswont effect the quality of male semen , but in the same time ,  performing it in excessive way such as ( 3 times daily ) won't increase the chances of getting pregnant , so just try to perform sexual intercourse in mild range such as once daily and it's enough to get you pregnant 
 lie down after sexual intercourse for about half an hour , and don't wash your private parts directly after that 
4take care of your and your partner life style quality , eat healthier food , sleep well , avoid stress and anxiety , do exercise regulary
How to know ovulation days and the safe days in period :
ovulation time or the time ovum exist are the first 4 days of the last 16 days of the period , for example ;if your period is 28 days , and  if your first day of period was 1st/9 , your ovulation time is 12th-16th /9 
the ovum last 48 hours in the uterus and can get fertilized any time during this period of time 
male semen lasts up to 5 days in female uterus and will be able to fertilize during this period of time , but the earlier the better 
Medication to help you get pregnant ?
 multivitamins and fertility supplements 
ovulation activation injections 
folic acid 
first , consult your doctor before taking any of those medications