@Lisa0
please don't stress - I have just finished the regime of 26 injections, one every 4 weeks. It's like any other medication they give us, side effects for some but not all! My first was with the Oncologist and the other 25 were with my GP with regular review with the Oncologist. I was always given a numbing injection first. It is a slow release medication, a port that dissolves over the 4 weeks. Alternate sides eases the side effects as I found my left side months were my side effect months, make sense? who knows!
Take care