My RE told me my meds kind of stripped me of my hormones & my body was lacking estrogen which would cause me to lose my lining. Finally, tripling up my patched made it stop (and gave me TONS of pimples).
I slowly took my patches off & have been patch-free for 3 days now with no bleeding.
I wish you TONS of luck with your RE!!! It is a super exciting time and I hope you get knocked up right away! 
xoxo
__________________
Me = One ovary
Him = Low Motility/Morphology/Count
No Insurance
IUI#1 ($300 consultation)
cd 3-7 5mg Femara ($98)
cd 6 HSG - all clear ($695 -- i think)
cd 10 u/s - 16,14,9,7,5,3 ($275)
cd 12 - trigger 10pm ($98)
cd 13 - bleeding - estrogen patch stops it ($118)
cd 14 - IUI @ noon - continue patch ($495)
cd 14-27 - progesterone cream at night suppository ($63)
cd 27 - AF
IUI#2
cd 3 - u/s ($275)
cd 3-7 - 5mg Femara ($98)
cd 6,8,10 75 units Follistim ($258)
cd 10 - u/s - 16 mm folli with lots of littles ($275)
cd 12 - 75 units Follistim
cd 13 bleeding WTF?!?! Double up on Estrogen Patch Trigger at 8pm ($98)
cd 14 slight bleeding
cd 15 - IUI ($495)
cd 16 - 18 still spotting. stupid uterus.
cd 22 - JULY 8 - one week down... ONE TO GO till I get my expensive BF(???)
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