If your blood alcohol level rises quickly then this can interfere with brain function- particularly in the hippocampus which helps form memories. This can mean you have fragmented or no memories from times you have been drinking heavily. Often if you drink a lot quickly or drink on a empty stomach then this will worsen the effect. Perhaps try alternating a soft drink with alcohol or just cutting your consumption and see if this helps.
Because you are maybe blacking out. Which is pretty bad. Try to cut back on your drinking please.
You're drinking way too much‼️