blood work

So I got my period today! Unfortunately. I was really hoping I was pregnant. It's been over a year almost 2. What's going on?! So ladies, have any of your partners gone to the dr to get tested? To see if there's any problems? What kind of blood work or test are made? Is it with a regular dr. I have been telling my partner to go. He's always been the type that never likes to go to see a dr. I think he might be a little scared of what they can say. Although he's almost 33 but has 2 kids, 1 with previous gf and we have one together. My ob dr says all my blood work is good I'm healthy and I have regular periods. What can be the cause? He did gain a little weight and has high cholesterol. Can that be a problem?help need advice plz!