Felt a sudden sharp pain in the front of my thigh at the very top, what is it?

I am 56 yrs. old, female, and in decent health. I work hard every day, own my own business and am either waling or standing many hours every day. Yesterday about 3pm I was driving and felt a sudden sharp pain in the front of my thigh at the very top. It lasted just a second. Then it happened again just a second later. I felt it again once today about 3pm when standing at work. A friend suggested DVT and suggested I take an aspirin. I took one 325 mg. aspirin. About 5 hrs. later I felt it again, just once. I took two aspirin this time and am sitting down now. I had a hip replacement on that side 1 1/2 yrs. ago and when I was 17 yrs. old I had a blood clot in a calve from folding my leg at the knee and sleeping on it during a transoceanic flight. I am really nervous and don’t have a doctor. I live quite far away from any doctor and don’t know how to tell if its a muscle tear or not. I can’t really afford to see a doctor but if I do, what kind of doctor do I see. What do my symptoms sound like to you? thank you.

Age: 56
Female
Medications: none
General Information: I think I included everything in the original question