Hi all,
I started my Biology PhD in October, so I'm ~ 8 months in. This was something that I wanted for a long time and I worked extremely hard during my undergraduate degree to achieve it. The first three months went great and I was generating loads of data. However, the past 5 months have been horrible. I've spent multiple weekends sat tearful on the sofa, cried in the university toilets (which is out of character for me), turned up late for work on multiple occasions and I've had to take quite a few days sick leave to re-cooperate. I feel incredibly rubbish and that I aren't good enough to complete it. I'm constantly looking at others and how happy they seem and how they can generate data etc, yet my project just seems utterly rubbish. Should I just quit? This is all I ever wanted so I'm frustrated and have no idea what else I would do with my life, alongside the worry of disappointing my family and supervisor.
Thanks for any advice.

Maybe you are just having your "second year blues" slightly early lol.

What's your relationship with your supervisor like? My advice would be to discuss with your supervisor how you are feeling and possible reasons for it. You could maybe look at altering your project if need be. Don't struggle on alone.