My car started off making a squeaking noise and.

How do you 'tighten" a strut? I guess I could see how a worn lower bushing for the mounting bolt could squeak, but tightening that bolt won't solve anything.

Do you hear any other noises now, like grinding or clunking? Were you hearing any noise before this started? I saw one years ago where the fellow ignored a worn wheel bearing for over three years until it was so bad the wheel was tipped and rubbing on the brake caliper, ... And he still refused to believe anything was wrong!

If you don't see anything obvious, it's time for an inspection at a tire and alignment shop. In particular, they will look at the lower ball joints, control arm bushings, and tie rod ends. Squeaks are always a sign something needs attention. Usually it means the affected part is worn, not just loose.