It is important to take medication as prescribed during pregnancy to ensure the health of both you and your baby. In your case, the prescription "1TAB OD BF" means you should take one tablet daily before food (before meals). Taking the tablets after meals may not provide optimal absorption of the nutrients. However, since you have already taken 5 tablets after meals, it is unlikely to cause any harm to your baby. Moving forward, make sure to follow the instructions correctly and take one tablet before each meal as prescribed by your doctor. If you have any concerns or further questions, it is always best to consult with your healthcare provider for personalized advice based on your specific situation.