I'm A 41 Year Old Female And My Left Leg

I'm a 41 year old female and my left leg hurts from my hip down as soon as I stand it becomes debilitating for a few minutes and then I could walk again my question is what could that be my cousin gave me a nitro because I also had a few chest pains And my left arm. Heavy when she gave me the Nitro under my tongue I felt like a vain wanted to bulge in my leg my heart and my arm all on the left side and the pain in my left leg subsided not completely gone but enough for me to deal with it what could this be