progesterone level low plz help

Rosie. • I`m 26 yrs old my husband is 28 we have been trying to conceive for 6 months 3 months after we had a miscarriage!
So I discovered I was pregnant yesterday after trying for a year and had 2 miscarriages today I went to my doctors appointment and my hcg level is normal but my progesterone level is very low is at 2.7 I'm about 2 3 weeks pregnant she did put me in progesterone vaginal tables 3 times a day! Is this normal? Do I have hope for my pregnancy? Any comments would help