I've got a 5mg pen with 2 doses remaining plus the 'golden dose' and I have a 7.5mg pen to start once I've finished this pen. My problem is that this is my 3rd 5mg pen and I don't think it's working for me now so I need to increase my dose. Does anyone know how I can work it out so I could potentially do a 6.5mg dose using my 5mg pen?