try and fast until your are famished. then do 1 meal refeed. Keep it keto so your insulin response stays low and it will be easier to go back into a fast. Then fast again until you are famished. Repeat until you’re at goal weight. It’s a journey and very personal to you. Check out Cole Robinson’s snake juice videos. I find him motivating but be warned he curses and yells a lot. I think adding in electrolytes into my water helps me with the fast. 81 hours into my fast right now and feeling good thanks to snake juice.
I’m in a similar spot. 140 hours in and planning on doing two weeks. I’ve done a lot of fasts but directly prior to this one I kept starting and breaking at 63hours. It was so frustrating that now that I’m feeling good I don’t want to re-start again if possible. The first 2-3 days suck so in my opinion don’t stop if you’re feeling good.
That being said if you feel like you really need to stop listen to your body, do like others suggested, take a break, eat keto and start again. Until I hit my goal I’ve been on and off regularly for months but for me, the longer the fast the better I feel and the better my results. If you’re like me it may take a few shorter fasts until you’re able to handle a longer one but it sounds like you’re doing great!