I had symptoms like yours, the tiredness all the time, tummy pain, gas, apparent bloating, digestive problems, etc (minus bleeding, i have an implant and dont get any bleeding) and had a bunch of blood tests to test for coeliac, coliitis, diabetes and thyroid function.
My tests came back my thyroid hormones are low, got a repeat on the30th to decide if i need meds, but i have all the classic symptoms, dry skin everywhere, sensitivity to cold, extreme tiredness, and bad reflexes. I did also have an inflamation reading of 2, but OD prevented me doing a stool sample to test further for potential mild colitis, so just diagnosed IBS. I also have an overactive unstable bladder, i'm wondering now from this thread if i might need to ask and be checked for possible fibroids when im back on the 12th july as my altered diet hasnt reduced the digestive symptoms as it should have.
Did your blood tests check for possible IBS or IBD? Coeliac can be symptomless with symptoms developing later in life so it IS possible you have it and just recently started experiencing symptoms. The roundness of your tummy would suggest it is more likely bloating and not fat, or a mixture of both, i am overweight and carry worst on my tummy but its more apron type than rounded like a baby bump. That said, my dad is overweight and has a rock hard stomach that is exactly like a baby bump, so it is technically possible to carry fat like that.