l am near-sighted and have been wearing glasses since January. It used to be that l could still read street signs but that they would just be blurry. Now I am to the point were l can not read a sign 15 feet in front of me. Even if l squint l can not tell what something might say. Is it normal for my eyes to be getting weaker? Is it normal for it to be such a dramatic change?

EVERYONE. That is why l do not wear reading glasses

when you do not wear glasses the eye mantains its elasticity because it struggles to focus on the things you are looking at. but once you put the glasses on, the eye is relaxed and it is not working as it was used to and your sight gets worse. it happened to me too and i've been wearing them since february.
however it is better l guess to wear glasses as you avoid headaches and you do not force the eye that much.

Depending on ur age, it is possible for ur vision to be changing quickly. You say you're nearsighted(Myopic). That means distance vision is blurred as u described. Most likely what is happening is since u have become accustomed to sharper vision with the glasses on, u now have a vision comparison. Before u had glasses, ur brain made a ''blur interpretation''. If u were to discontinue wearing ur glasses( l do not recommend that though), the ''blur interpretation'' would likely come back. But again, u would still be Myopic & ur distance vision would remain not as clear as when u wear the glasses.

Welcome to the world of clearer vision!!! Good luck!
Dr. Ford

Mostly this is true and more often than not it applies most to people who wear their glasses/contacts FULL time. If you do not want your vision to get worse, only use your glasses when you want to see distance and NEVER use them for near work as the power is too strong for your eyes- this causes eyestrain and can make your sight worse.
It is possible to improve your eyesight by doing eye exercises and by practising good vision habits.

Most.
But it has little or nothing to do with the glasses.

Especially with myopic teenagers: they get their first glasses because the eyes *are going* short-sighted* but although the glasses sharpen up the vision at the point of examination, the eye is rate of change is completely unaffected by that: the process that made the eyes need glasses in the first place is still active.
It is hardly suprising, then, that in a year or six months, a new Rx is required. The stronger Rx would be needed whether or not the first glasses had been given.

The other factor at play is awareness. A lot of people r unaware of how poorly they r seeing, & the sudden contrasting availabilty of good vision makes it seem like things r a lot worse.
You can suddenly make every knife in ur kitchen blunt, by buying a new knife.

*It is largely a growth thing. Most Rx is stabilise between 18-22 years of age.