Yesterday I sold my Bitcoins of 1.21 not at the highest thinking it would go down so I could do a rebuy , seeing a downward trend (-$200), but instead when waking up they were higher for about $200.

I initially bought them for $5500. Now I don't know what to do. If i need to rebuy the same amount it wil cost me about 450 dollars more then when I sold them, thus losing profit.

When SegWitx2 got cancelled and Bitcoin Cash skyrocketed I also forgot to sell and Hodl until I lost  all my profit.