Pregnant with hormones roller coaster!

So, I'm pregnant, We were trying for 1 1/2 year and finally did it! But at first, one week after positive opk, I got bleeded for 10 days, made an u/s at 5 weeks and 4 days (according to my last period) - there were an egg with yolk sac in it, and technic told me I'm 3-4 weeks (and according to opk, I was 3 weeks exactly ). Now I'm about 5 weeks and still have low progesterone levels (hcg is growing and is on a good level though) despite the fact I'm taking progesterone pills. Now I'm changing to another progesterone pills and hope everything will be alright with my little baby Roo (hubbs calls me Kangaroo now, lol).