Suggest Remedies For Irregular Periods And Lack Of Lubrication During Sex

Hi, I am 31 & my wife is 30. We are trying for a baby for last few months. Her period is regular but it stays only for 3 days. Now a days when we are trying for sex I can not penetrate smoothly due to lack of lubricant and my penis became softer quickly. She never take any contraceptive pill. Pls help us.