Cognitive decline from drinking

I recently spent a summer programme, around 6 weeks and I would drink heavily during the weekends even weekdays and towards the end it felt like I experienced cognitive decline. Best way to describe it it’s like misinterpretation of sensory experiences something would happen and my brain would completely misinterpret and a couple seconds later I will think what is happening to me, in general I’ve felt like I’ve experienced cognitive decline even after 2 months. Is it possible to have experienced repercussions in that short span or simply a byproduct of brain fog which will eventually go away?.