Pulsating in back, head ?

For months and months I have had very bad pulsating in my head like the blood is constantly popping in my head I feel it through my neck but every time I get checked my blood pressure, I don’t have high blood pressure. I also have pulsating in my lower back which I looked up and I’m concerned I’m having a aortic aneurysm. People if any of you are really really good with the stuff and I’m not ******* in the mood for any bullshit or joking around, please people I could use your help anyone who’s good with medical stuff like this give me advice I’m 22 btw I don’t know if that works in my favor for having these issues.