I am having some slight bleeding with this pregnancy yet again!

I am having my HCG and progesterone levels done.

My progesterone levels have dropped but are still in the good zone, so was just wondering if anyone can tell me that they are still good and not to worry with the drop?

My HCG's are good and comparable with my single successful pregnancy of my son.

I will list my levels below:

4 weeks - HCG 220, Progesterone 54
4 weeks 6 days - HCG 2800, Progesterone 45

I am now 5 weeks 1 day and will have another level done on Monday, which will be 5 weeks 4 days.

Is there a reason why the progesterone levels drop. Is there anything I can do to keep my progesterone levels up???

Thanking you all in advance for your help.