Abdominal bloatedness and discomfort are symptoms that most women will experience from time to time. As your symptoms are related to the middle of the menstrual cycle, this may be ovulation pain or mittelschmerz, a German word that means "middle pain." This is usually normal and common affecting about twenty percent of women. Most women usually report a nagging pain that begins as a sharp twinge and diminishes into a dull ache for the next day or so. The discomfort usually occurs in the lower abdomen and can be aggravated by intercourse, or other physical activity. The best way to diagnose your painful ovulation is to keep a chart or diary showing when the pain occurs in relation to the start of your menstrual periods. Your doctor will use this diary in conjunction with your medical history, a physical examination, and perhaps some other medical tests to rule out other possible causes of your pain before making a diagnosis of mittelschmerz.
Abdominal bloating and distension can also be due to a group of functional disorders called irritable bowel syndrome (IBS). Patients with IBS tend to be unusually aware of gas in the digestive tract.
Although cancer of large gut (colon) does not usually present with bloatedness, cancer of the ovary, a silent killer may present with these non-specific symptoms.
If your symptoms persist, you should consult doctor to find out the exact cause. Occasionally some women may require laparoscopy, in which a narrow tube with a fiber-optic light on the end is introduced through a small incision below the navel and into the abdominal wall to help determine the cause.

It is true that risks of miscarriage and genetic abnormalities in the babies are found to increase with the age of the father too. You must also remember that the chances of conception also decline as the husband ages. The testes tend to get slightly smaller and softer with age. The quality of the sperm also decline with age although not so drastic as seen in the eggs of the women. However, decline in sexual drive and difficulty in achieving erections in older men may be important factors in affecting chances of conception. Studies have shown that men aged 35-39 had significant lower fertility than younger men. As both of you are not in the optimal age for conception, do not delay trying for a baby.

Please see Adenomyoma for answers.

Amniocentesis is an invasive diagnostic test to detect abnormal chromosomes in the baby. The most common chromosomal abnormality is Down's syndrome. It involves withdrawing liquid that surrounds the baby (Amniotic fluid). It is usually done at about 16-19 weeks of pregnancy. The skin of the abdomen is cleaned and numbed with a local anesthetic. Under ultrasound guidance, a long thin needle is passed into the womb and about 20 cc of amniotic fluid is obtained. Fetal cells that float in the amniotic fluid can then be cultured. Any abnormal chromosomes can then be identified. The result usually takes 2 weeks for all the 23 pairs of chromosomes to be analyzed. The risk of amniocentesis is miscarriage being 1/2 to 1%. Other risks include injuries to the baby, placenta, umbilical cord; infection of the womb and premature birth
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In medical terms, no menstrual period is called amenorrhea. When this occurs in a woman who has never had a period it is called primary amenorrhea. In cases like yours, where there has been cycles in the past, it is called secondary amenorrhea.
The most common cause of secondary amenorrhea is pregnancy. Sometimes a breast-feeding mother may not have menstrual periods. Periods may also take 3 months or longer to resume after a woman stops taking birth control pills.
Please see Secondary Amenorrhea for further details.