Alone2005

My husband and I, both 26, have been married for 2.5 years now. I was technically a virgin when we got married, so we hadnt had penetrative sex until the honeymoon.
We actually had sex maybe 2 times during the 10-day honeymoon and this was because my husband didnt particularily want to, even when I came on to him. Because weve lived apart in different countries for almost the entire time weve been married (because of work), meeting only on the weekends, for the first year I just assumed that we werent used to sex and thats why he didnt want to do it much. He would come in late night from the airport and be "tired" many times even when I was dressed in lingerie and coming on to him. Sometimes he did want to have sex, but not always. The most frequent sex weve had was 3 days in a row (once a day).
Though our living arrangement is far from normal, I think that any guy his age who was a virgin would want to do it ALL THE TIME, 3 or 4 times a day atleast for the few months after the wedding and then on the weekends also because thats the only time hes with his wife.
I know he loves me and he isnt cheating on me.
He is about 70 pounds overweight and has always been heavy since childhood. Also, during sex, he doesnt seem to produce very much semen. Is this an indication something is wrong?
He says he just doesnt need much sex, but even if thats the case wouldnt he want it alot atleast right after getting married?
He has finally agreed to go to a doctor, but I would like to know if theres anyone out there who can relate to what Im going through and how to deal with it?
Is this even remotely normal like he says it is? Im going nuts because I feel like I must be incredibly unattractive for a guy not to want sex at all except once a week or 10 days. I feel like we just got married and have a practically nonexistant sex life - arent newly married people supposed to do it frequently?