You know what Nali, I agree with you (partly).
I also do not think that Prats will be pregnant... Seriously, they decided to have a child barely a week ago, and she's already pregnant with morning sickness? Too unbelievable if you ask me.
This is just another case of counting your chickens before they hatch. It's happened in the show multiple times before as well, and apparently no one in the family has learnt anything from their past mistakes. Prats was previously considered preggy when she threw up, so was Komal.
I do not think that Pratigya has some serios sort of illness though. You may be right, and the Meera having a baby track may be introduced, but at this time, I think that a lot of tracks are already open (Meneka's past, Meneka with Samar, Krishna-Meera, Arushi-Tanmay, Kesar etc)... at this time, probably introducing one more track will be more than can be handled at one time, it will all become a big jumble.
What I think is, that this is just another case of food poisoning. Personally, I am not looking forward to the Kriya baby coming so soon. I wanted some tracks to be wrapped up before this one came.