Alarm! My Twitter was hacked!

So about 15 minutes ago I got an email that there is a login into my Twitter account. I was suprised because I didn't login for the last couple of hours. I checked the email and it says that location is Tunisia. And I'm not from Tunisia!

Straight away I changed my password and went to my Twitter. There were 5 tweets with some links (which, of course, I didn't press on them and I hope nobody did) and some tags of people or companies. All the tweets looked like this:

Also just three hours ago I got a comment to my website which didn't came from WA comments tool. The comment is short but kind of related to my topic. I'm not sure if this could be related? If you walk your arrow to the website which is provided below the picture (without pressing on the link), for preview is shows 404 error.

Any advice of what I should do next? I changed my Twitter password and I'll change in all of my other accounts that I frequently use but is there anything else I could do? How to be sure they won't hack again or won't find my other accounts? Help!

Please everyone be careful and put super strong passwords!

Thank you,

Jolita

UPDATE: I deleted the picture of the comment I got on my website. It seems like it is spam because it has email and website which, like I said, shows error and the comment was very short. Kind of to my post's topic but without saying any meaning generally. Thanks to my attention to details and good timing, I saw that this woman is a member of WA. But she left a comment not through a comments section. Now if this woman is not related to anything that happened to me I don't want to slander and I thought it's better to delete the picture because it shows her name.