Hi everyone

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I've been visiting this site since I began my "weightloss journey" in January but have never posted. Little personal info for those who like to know, my name is Holly, I'm 23, still in college studying Finance, and I live in Maryland, only half an hour from the beach. Now onto the weight stuff.
In January I decided it was time to lose the extra 60-70 lbs I've been carrying around. Believe it or not I had never actually tried to lose weight before, I thought if so many people had trouble with weightloss then it couldn't be simple, there must be some secret trick to it so I just never tried. So I did tons of research, joined Fitday, reduced my calories to 1500 a day, cut out all drinks besides water, and started exercising regularly. In the first two months I lost just under 20 pounds, I went from 207 to 189 then my progress just stopped. My conclusion was that I wasn't eating enough for my activity level so I decided to up them.
For about a month I stopped exercising and stopped counting my calories in an effort to raise my metabolism. I gained back 2 lbs in that month then May 1st I started up again with my calorie range between 1600-1800. I immediately began losing again and went from 191 to 183 in about two weeks.
Now for my problem. Its been about a month since I first saw 183 and I have been hovering right around there this whole time. It just won't go down any more. I started exercising again because it stalled and my weight went up! I have been keeping my measurements since January and I'm not losing any inches either (I've only lost like 6 inches total anyway).
It's not like I have unrealistic goals, I would just like to lose 1-2 lbs per week and not have my weight stall every five pounds. My ultimate goal is to be between 130 and 150 (a very healthy range for my 5'5 frame), I'll know more when I get closer as I've never been thin as an adult. My problem is I don't know where to go from here, I'm afraid to up my calories more and I'm afraid to lower them. I exercise about an hour a day (30 mins lifting, 30 min cardio) so I don't want to increase that either and I only drink water.
I'm open to any suggestions, I'm just looking for the best way to change up what I'm doing and would love some input from other knowledgeable chickies. Sorry it's so long, I can get quite wordy.
Thanks for taking the time to read this.
Holly