I agree with others, it'd be nice to know what your plan is, what an example day of your food choices is and how much/what type of exercise you're doing. You'll get more specific answers that way.
In the meantime, some things to consider:
- Are you getting in enough water?
- On average, how many calories are you eating every day? It could be too high or too low.
- When you exercise, what kind of exercise are you doing? If you're lifting you might need to eat some protein afterwards and that can also make you retain water.
- Are you checking your measurements? They can change while the scale doesn't
- Do you have any health issues such as PCOS/thyroid problems/diabetes etc? Again, there are specific diets that can help with those.
- When was your last check-up with your doctor? Have you talked to him/her about you weight loss and any suggestions from him/her?
- Are you getting in a high salt intake that would make you retain water?
If you provide more details we'll definitely try to help you further.