Invite Question

I’m getting married end of September. Got engaged about 6 months ago, so it has been pretty hectic planning but the date in September worked for the venue we wanted and for family/close friends. I sent out STDs in March to some people who I knew would for sure be invited but things have been a little crazy w/ the planning and other things (fiancé’s dad was recently diagnosed with cancer). I sent out most invites 2 weeks ago but had an issue with address printing for some that I had to redo and some other friends that I decided I wanted to invite so I sent them out this past weekend. At this point these last invites should be received about 7 weeks out from the wedding, but some of the guests are from out of town and would need to make travel arrangements. I feel really bad about sending the invites out so late. I totally do not expect people to come from out of town last minute, but I did really want to invite them. At the same time I don’t want them to be offended by the short notice so I debated whether to send at all. This is completely my fault for being disorganized but is this really awful etiquette?