So...I had my check-up this morning, I'm 4dp3dt. I was psyched to see my actual primary doc whom I LOVE! He also did my transfer which was sooo nice! Anyway he told me that my transfer was one of the smoothest he'd ever done. This was encouraging for sure. Then when he did my u/s he said something like "your body's reaction is not commensurate with your age...it's more on line with a 32-year old"...again, super encouraging. Then he looked at my ovaries (particularly the left...where the majority of my follicles came from) and he said they were quite full of fluid. He had a weird look on his face...not worried so much, just odd. He asked if I feel bloated or full, and other than being seriously backed up (sorry TMI...it's the damn progesterone!!) I told him no. He told me that he wanted me to start weighing myself and that if I gained 3-4 lbs over the next couple of days to call the office. He started talking about ovary stimulation, blood flow and fluid retention and I couldn't help but glaze over! Not intentionally, but I just have no clue what he's talking about!!! (Paging Dr. Ali!!). When he was done I asked him if everything was ok overall and he assured me it was...he almost seemed psyched...I've been a googling fiend, and all I see are articles on OHSS....I honestly feel fine and have none of the symptoms they warn us about...anybody have any insight??
Paging Dr. Ali!

Too funny! Yes OHSS is what he was worried about, but like most Dr's they don't want to give you a name because they know you will just go and use Dr. Google!

So yes, he was probably worried about OHSS, it is where the ovaries are hyper stimulated and it causes your cell walls to collapse and the fluid to leak out and then it accumulates in your abdomen, and you gain like a lot of weight overnight. It can back up and cause you to have trouble breathing, and all sorts of other nice feelings!
If you feel fine, then go with that, but if you do start feeling bloated, or your pants don't fit or you suddenly gain 5 lbs overnight, then it is a cause for concern. If you are 7dpo (4dp3dt) then you are probably in the clear.
UNLESS you are pregnant. The OHSS is stimulated by the hyperstimulation of the ovaries, then further exacerbated by HCG! So IF you are pregnant, that HCG level should be rising starting as soon as yesterday and continue to do so. So if you get worse, I'd POAS
If you do start getting worse, definitely call your FS, but things you can do to prevent it: keep hydrated, and eat protein, and if you get bloated just eat several small meals (of mostly protein) during the day.