S. - My first thought it - What does your Dr. say?
I was a lot older than you when I started having children. I couldn't conceive and went through all kinds of tests. Eventually, a specialist had to go in laproscopically(mis-spelled!!) and remove some polyps from my uterus and clean out some gunk near the ends of my fallopian tubes.
And then that same specialist wanted to have me pay $30,000 for invitro. I went to another Dr. and asked for Clomid, and got pregnant within 2 months. I used clomid again for #2 (who had a birth defect and didn't make it) and #3 who was born just 7 months ago.
I completely understand the feelings of just WANTING AND WANTING to have another child. It is horrible every month when you are disapointed. Many people told me to relax and it will happen. But my feeling is that if you want it, you need to work proactively to make it happen. Start with your Dr. Read some books.
Do you know how to read your body's signals for when you are ovulating? I used to try to conceive (with my spouse's help!! LOL!!) on days 11-15 - (Day 1 being the fisrt day of my cycle).
The clomid just gave me that extra boost of ovulating power.
I have no experience with the m/c, but if you have that history, I would think that your Dr. would put you on a hormone as soon as you become pregnant.
Since I was 'advanced maternal age' and trouble conceiving, I was going in for lab work once per week the 1st 15 weeks after being confirmed as pregnant. When my progesterone levels were low or not increasing as they should have, my Dr. put me on a progenterone hormone to keep the pregnancy going until after I reached about 15 weeks I think?
And one last comment... take your prenatal vitamins. My second baby had a Neural Tube Defect called anencephaly. The folic acid contained in prenatl vitamins will help to prevent this kind of defect (a lessor form of it is spina bifida).
Good luck. W.