Information about autoimmune disease can be obtained from your doctor. Womenshealth and Childrenshospital websites offer a lot of useful information on this topic.

The website Womenshealth offers a nice overview of the stages of pragnancy. This also includes a section about the developing baby in the first trimester.

Yes.

Heavy bleeding is just one of many signs or symptoms of endometriosis. Actually, many women with endometriosis have none of the usual symptoms and would never know it without an exploratory surgery (or if the doctor noticed it during caesarian delivery), because endometriosis doesn't appear on ultrasounds, blood tests, MRI, or XRay. For more info check out: http://www.womenanswers.org/womenshealth/womenanswers-org-a2-1136.html

There are certain pills that you can obtain with a prescription. They can momentarily delay your period so that if you have an event coming up around your cycle you can push back your cycle. "Norethisterone is a progestogen hormone in tablet form, which is taken three times a day for three days before your period is due and then for seven days to delay the period. At the end of the seven days, the tablets are stopped and your period starts as normal. It is available on NHS prescription from your GP." (taken from http://www.netdoctor.co.uk/ate/womenshealth/207372.html)

No, naproxen has been shown to decrease menstrual blood loss because of their ability to interrupt excess prostaglandin F2-alpha.

Source: http://www.drnorthrup.com/womenshealth/healthcenter/topic_details.php?topic_id=67