I suffer from Low blood pressure and the only ones that I don't get are the stomach aches and the dizziness when breathing deeply, low blood pressure runs in my family and I've never heard of that with them either. The best way to check is to go to the doctors, they don't take blood, it's just one band around your arm. You need to get it checked though as low blood pressure is linked to blood sugar levels so try and maintain a healthy level of sugar in your system. My school ended up putting a care plan in for me because stress triggered my blood pressure so it is best to get it checked but unfortunately if you do there is no official diagnosis like high blood pressure, therefore you need to maintain a healthy lifestyle to deal with it.