 [ Symptoms ] my girlfriend is on birth control and had a 2 day period could she be pregnant  hello my girlfriend is extremely worried that she may have the early signs of pregnancy she is on birth control and has never missed a pill her last period was a day late and very short lasting only two days the only symptom she has noticed is a little bit of weight gain  she will be testing tomorrow but what are the chances she could be pregnant [ Disease ] as with any medications otc or prescription you must be careful of interactions with some bp meds an interaction with anti inflammatory drugs such as ibuprofen can interact and affect your kidneys always read your pamphlet that comes with your medication your trusted pharmacist will also explain the possible interactions if you have questions about your medications i know this is way later than actual question date hopefully someone with same question will realize that not all otc meds will be safe taking if on medication for hypertension