Stuck

It’s just really frustrating.
I’ve been running every day for the past 4 months and eating 1200 or less calories almost everyday. The odd day I will eat a little more but never too much.

I lose a few pounds then BAM I’ll gain them back. I just can’t seem to get past it. I have already lost over 60LBS in the last few years and I’ve maintained it. BUT I ‘m trying I guess to get more lean, if that’s the right word. I am 5 ft 7” and currently 124lbs – a week ago I was 121 lbs. I’m trying to get to 119-115 area and stay there.

Anyways I’m stuck and I don’t know what to do anymore.