Go see your GP as many have said and don’t expect any sympathy or help from work.
Best bit advice if your working as a contractor.
Taking the drugs prescribed by the GP worked for me. It kept me in a job and gave me time and head room to make the changes in life that needed to be made. If an when you do come off them please listen to the doctor (i didn’t), its a gradual process and needs to be managed carefully. As be aware that different antidepressants work for different people, my first prescription stopped me doing something stupid but made me feel like I’d been coshed. A change of prescription made a huge improvement.
I can understand the desire to take something natural but St John’s wort is not something to take without advice. It can also mess with the way your body deals with other drugs so the GP needs to know you are taking it.