I had my first two days ago. My arm ached around the site (still does) and I had a mild headache, which a couple of paracetamol took care of. The most annoying thing so far (fingers crossed my periods don’t make a return) is I’m so sleepy. I thought that would wear off after one day, but nope. It’s 10am and I’ll be heading back to bed soon at this rate! However, if this is the worst I get I’ll be very grateful.