Condom question..

Averi
My husband and I had our first baby this past summer. We want to eventually have more children, but will wait a little longer, due to me having a c-section. Since the pill makes me an absolute disaster, we decided to use condoms for protection in the meantime.
Well Last night after sex, he noticed that there was no semen in the tip of the condom, but it was slightly higher up, around the shaft. The condom didn't break.  Should I be worried about it leaking from around the sides? We've always used the same brand, and we've never had this issue before..
Thoughts? 
Thanks in advance!