I've Been Really Tired Lately, Can't Sleep Well, And Have

I've been really tired lately, can't sleep well, and have been bruising very easily. Recently (May) had a stillbirth and lost about 2 liters of blood, no transfusion. Doc has run lots of test, I'm no longer anemic and all blood counts lead to my body having replaced the lost blood. Eating low carb diet trying to lose weight. Every time I get up to go run (mild, 5-5.5 mph jog) I feel like I need a nap immediately afterwards and I'm dragging all day long. I go to bed between 9-9:30 and wake up around 4 every morning. 37 yr old female diagnosed with PCOS but symptoms have subsided in the past 3 years and all except this month have had regular 28-30 day cycles (Just tested, I'm not pregnant and it's been 13 days since last time we've had intercourse) Also have been having reflux the past week or so. I also experience frequent bilateral joint pain in knees, elbows, fingers and wrists