Hi Cherrie,
This postop time is a big hormonal shift, so it seems to me...  I always felt that Spiro left something to be desired, that having the T factories removed would change a lot.  So far for me, not so much.  I'm returning to pre-surgery form, thankfully (my boobs disappeared when I went off E, and they're slowly reappearing now).  But, thinner skin is another effect of E vs T.  Possibly you've had veins that weren't as visible before?  And, not knowing your age, can't guess if it's just something that appears with time...
I couldn't answer regards progesterone, or whether the product you're using is a combination of E & Progesterone - there's nothing decisive in Google 
Ask your doctor...