EDIT: Just converted the bitcoins into USD for time being to avoid any further loss, lost $200 in this entire process as of now! still waiting to hear from XAPO.
You shouldn't panic while bitcoin will correct like this, you should now buy back bitcoin at current dumped price which is also a new floor/bottom price for next pump.
Other alts have already started to dump so those money might flow back to bitcoin.
Bitcoin transaction fee is at sky right now because miners have started to mine bitcoin cash and left bitcoin mining.