I walk every morning and this morning my right leg at the knee started aching, then it felt swollen up my leg I made it to my house and ears were ringing and I felt like I was about to pass out, I m 66 year old female on 20 lisenopril, checked my blood pressure and It was 78 over 58, I drank some water and ate a bagel and felt better, feeling fine now just not much energy. Would it do any good to go to doctor now?