Solved!!!!! Help! Can anyone tell me why I can no longer see previously posted photos?

Everything seemed okay until the last post but one. Then I noticed I was getting 'no entry' type signs instead of a photo. Now I can only see photos on the current post. It's this the same when you look at my blog?
Any ideas how I can fix it?
Thanks
Anne

Edited to add - I think the photos that don't show have been deleted during a technology meltdown earlier in the week! I can't redo most of them, but can redo some. I think I'll also create some separate tabs if I can work out how to do that.

Further edited to add
When I had the technology meltdown, following an Android upgrade to my tablet, everything was running so incredibly slowly..  I decided to reduce the burden by taking some photos off. Then I had to reset the tablet to factory conditions in any case and rebuild from there. What I didn't realise was that removing the photos from my tablet or phone was deleting them from my PC, albums and blog. I didn't realise it worked that way, even though I knew I could access from any one of them (it's at times like this that I realise I'm getting older and less able to keep up with technology!). When I twigged to this, I was able to restore all my deleted photos via Google+ because they had been deleted within the last 60 days. It's just as well that sometimes programmes question what you do and give you a second chance!

As far as I can see, all my photos are back on my blog.

Problem solved.  I still don't know how to create tabs across the top of my blog, though.

Further update -  I've now managed to create my pages as tabs across the top of my blog but haven't worked out how to link my pre-existing posts. I've put in the labels but am stuck for the night.