If you're doing the same routine every week, and only small weight increases in your lifts (and this may be the norm for women since we're not built for major weight lifitng out the gate), then your body may have adapted to what you are doing. There are a million ways you can vary that if you are capped by how much weight you can lift - this includes the obvious, switching up your training routine. But to keep it simple, you could modify how you group the training that you do as well as the overall volume. Some changes you might make:
2 muscle groups on the same day instead of 1.
- example: back & bis, chest & tris, if you do "legs", you might break out "hams & glutes" on one day and "quads" on another, and shoulders.
- I like doing 2 complementary muscle groups per session - but within that, you can also do a type of "active recovery" where one week you do the "first" of the 2 muscle groups as "heavy" (e.g. low rep / higher weight) and the "second" as "light" (e.g. high rep / low weight). And the next week reverse that and make the "first" your "light" and the "second" your "heavy".
Or change up your whole routine every 6 weeks or so. Maybe incorporate some Oly lifting or yoga or whatever classes or stuff you might have available to you.
For women, something to keep in mind while you're looking for "progress" in the gym- you do need to eat to lift if you're looking for serious gains. If you're not eating any particular way (or specifically just not getting enough calories / energy source) to support increase in lifts, then you are just going to be limited.