You are grieving. It is a natural process that takes time, and it's true that every woman goes through it in her own way.
First of all, accept the grieving process and don't be upset with yourself for being a little "weak" right now. You are human.
Second, draw on your spiritual beliefs to make sense of this. There really is a higher purpose for all of our experiences. Trust in that and it will be easier to move forward. Know that you will get to see your little baby on the other side. There will be a happy reunion, but for now, you both have different lessons to learn. He/she is in the arms of angels, waiting safely until you rejoin him.
Third, consider that your body just went through a whole roller-coaster ride of hormonal imbalance. Talk to your doctor about your ongoing depression and he/she might prescribe a temporary RX to help reboot your cycle. This really helps and is not permanent.
Fourth, get oxygen to your brain. Move, walk in the fresh outdoors, dance, swim, exercise, do yoga. Oxygen is vital to all of your cells, especially your brain cells!
Fifth, nourish your body with clean, nutritional foods. Stay off the artificial, processed foods. Sodas, sugars. They make depression worse.
And finally, take one day at a time. I lost my child and all I could do was focus on breathing. It may sound weird, but I also watched funny mindless videos to make me laugh. It still hurt in my heart but laughing helped heal the physical brain and body. I laughed and cried and cried and laughed.
Try not to dwell on what could have been, what should have been, what ifs. They will pull you down into an abyss. So, once you're written down your initial feelings. Burn them. Release them. KNOW that your little infant had a purpose for his brief stint in your womb. He fulfilled it and is peaceful and happy and safe now. Tuck the precious memory of him into your heart and bring it out when you feel like it whether to smile, cry, grieve or commune with him. But then, tuck him back in safe and sound so you can attend to life here.
Your job is to live. Be the strong, happy person that you are blessed to be. That is your gift. You have important things to do, love to create and share, joy to express, wisdom to gain. God and people are counting on you!

You will carry your bond with your baby for the rest of your life, but in time, the pain will soften into sadness and then sadness will melt into hope.
May God bless you eternally.