I was diagnosed with high blood pressure a month ago. At first, I took 10mg of Lisinopril. Then my doctor increased the dose to 20mg and told me to take two pills every morning. On 6/17, I refilled my prescription and continued to take two pills every morning. Today I realized the refill was for 20mg pills and I should only be taking one a day! So I've been taking 40mg, not 20mg, since the 17th. How bad is this? Thanks.