Yes, indeed. I lost four of my own in less than 3 weeks in August and sadly will need to say goodbye to yet another tomorrow. I still have another 10 piggies which are officially OAPs and some of them are now extremely frail...
Be kind to yourself, especially once you start suffering with what I call 'grieving indigestion', i.e. struggling with processing your losses when more arrive before you have been able to work through the last lot. Only time will solve that one for you, as well as getting used to the empty spaces. Every new loss will bring back the previous and more recent ones, too.
Try to focus on pushing enrichment more for your remaining piggies and concentrate on the quality of their life so you have little things to smile over and to create positive memories.
My own reserved new companions will hopefully be finally ready for adoption soon and bond with my various widows and widowers (who have refused to shack up with each other). I had to wait for more than a month due to a ringworm delay at the the other end. Anyway, that should boost my own mood again while I continue to work away at my own grieving underneath.