Thanks for the query.
Some amount of pain abdomen, nausea, weakness etc are common in early pregnancy
This can be due to embedding gestational sac
, hormonal effects etc.
But as you are having previous history of miscarriages better to be careful. Constipation
is a common complaint in pregnancy.
This can occur due to decreased motility and relaxation of smooth muscles of the gut.
Straining during passing stools can lead to bleeding.
So consult gynecologist once, get examined and go for ultrasound
If everything is normal, you can continue the pregnancy with the support of progesterone
This will help in relaxing the uterus and in maintaining the pregnancy.
For constipation you can use laxatives and antacids and antiemetic drugs for nausea.