I'm a 27 year old female who has been taking 5mg of Lisinopril fo...

I'm a 27 year old female who has been taking 5mg of Lisinopril for about 6 weeks now. I used to suffer from really bad headaches/migraines and ever since I started this medication I haven't had one at all. This is amazing since I used to go through a bottle of Excedrin a month. Lately I've noticed lots of joint pain and pain in my knees. It's terrible, I feel like an old lady and I'm only 27. I'm glad I found this site, I'm going to try to switch to a different medication ASAP. I've also noticed I've been spotting and having an abnormal period.. not sure if that's related to the medication though.