It is not uncommon for pregnant women to experience frequent trips to the bathroom, especially as the baby grows larger and puts pressure on the bladder. However, going to the bathroom every 5 minutes may be excessive and could indicate a potential issue such as a urinary tract infection or excessive fluid intake. It would be best to consult with your healthcare provider to rule out any underlying problems. Additionally, the position of your baby's head facing down does not directly contribute to increased frequency of urination. Your due date being in late March suggests that you are nearing the end of your pregnancy, which can also lead to increased pressure on the bladder. Remember to stay hydrated but try limiting fluids before bedtime and emptying your bladder completely each time you use the restroom.