In Shingeki No Kyojin, when does Eren lose 3 years of his memory? I was just reading asks on Attack On Titan and came upon this one What was Eren&#39;s vision about?

Where someone says in one of the answers that Eren lost three years of his memory due to his father experimenting on him? Can anyone tell me what volume of the manga this is from because I am all caught up and I don't remember this. I thought the timeline went like this (from the beginning of the manga/anime:


Dr.Jaeger says he's going into town to do some check ups
The wall is broken
The news reaches Dr.Jaeger (not sure how long this took)
He kills the real royal family
He goes after Eren (although I'm not sure how he found him??)
Injects Eren (like we saw in his flashbacks), Eren eats him and he dies.


I'm also not sure how old Eren was when he ate his Dad? I think maybe he was 12 or quite young. 
So in all this I don't remember his Dad doing any experiments on him or if was mentioned/explained/hinted anywhere?
From the manga and from the anime I don't remember Eren losing 3 years of his memory. From your timeline I think your pretty accurate, except that I would switch 3 and 4 around, as I think that Eren's dad went deeper into the wall to kill the real royal family.[Chapter 1, page 44] He killed the royal family by turning into a titan. Therefore I think it was only after he turned back to a human that he headed back to his home when the news of wall Maria fallen reach Dr. Jaeger.[[Chapter 62, page 19-24]][1] He probably then starts looking for Eren in every camp (where the survivors of wall Maria stay) there is to find Eren. As the royal family is looking for him, he needs to disappear. To do so and still fulfill his goal he injects a drug into Eren who eats his dad and gains Titan powers alongside the "coordinate".[Chapter 3, page 21 ] [[Chapter 10, page 32-35]][2]

Edit:
The only part I don't quite get is when Eren says to his dad "You've been acting weird ever since mom died"[Chapter 3, page 21]. It's the only time where it looks like Eren has seen his dad after the fall of wall Maria and before he turned into a titan, so that might be an indicator of a 3 year void in Eren's memory, even though this would be just speculation.