I can't get up usual time recently!

Recently I can't get up at my usual time.

On weekdays, I usually get up at 6:00 a.m.

But I haven't be able to get up at the same time recently since probably 3 weeks ago.

But for the last 3 weeks I haven't been able to get up at my usual time.

I think why I go home late every day due to a lot of work.

I think the reason might be that I have been getting home from work late every day, because of work.

Also, I eat a little for dinner when I go home over 9:00pm.

Also, I do eat a little something for dinner whenever I get home after 9:00 p.m.

Maybe they might make me to be tired.

Maybe this is why I get so tired.

Actually, we'll be fat if we eat late.

Actually, we would all be fat if we were to eat late.

(Hi Atsuchi, in your last sentence you are making up a possible scenario, so you indicate this using would instead of will. Thus,

'If I were to win the lotto, I would buy a big house' (here you are discussing a possibility);

you could also talk about a more concrete scenario, in which you have already bought the lotto tickets and say to a friend:

"If I win the lotto, I'll buy a big house")

But I haven't been able to get up at the same time recently for probably 3 weeks ago.

I think the reason is that I went home late every day due to a lot of work.

Also, I ate a little bit for dinner when I went home after 9:00pm.

Maybe they might make me to be tired. (I'm not sure what u mean with this sentence)

Actually, we'll be fat if we eat late at night.