disappointed... and happy

So I'm out for this month and next because DH is away for work for 6 weeks. AF showed up 2 days early. BUT, my sister just got a BFP a couple days ago so I'm soooo excited (and a bit jealous!) for her!
My periods have been very short and light since I went off the pill so I have an appointment with my Dr. in a couple weeks. Hopefully they will check my levels and get us on track for March. I would love to be preggers with my sister  

Anyone know what they do/give you if you have weak periods? They are fairly regular but only last about 2 days and are very very light... little more than spotting...
I've had 2 MCs in the past and I know I'm ovulating b/c I have been charting....

What would light periods have to do with it?

As long as you know you are ovulating you are fine.