Tired and feeling so low

So I’m 24 and I’ve been extremely exhausted lately, like more than I’ve ever felt before. I eat reasonably well and go to the gym 4-5 times a week. But lately in the past week or so I’ve been feeling like absolute crap. I was so tired this morning when I woke up I cried like a baby to my boyfriend 😩 I’ve never felt this crappy and down and depressed. I’m not sure if it’s stress of TTC (ttc for over a year with a recent miscarriage) or what but has anyone been in this boat, and is there anything you’ve taken like vitamins or anything else to help?