Preflop Call/Fold?

I'm in the big blind. No real reads, semi passive table, if people make hands they bet, no too much raising.

Having trouble with the converter so here's the email history (removed people's names, kept first letter):

Dealt to hero [ Td, 8d ]
H calls (0.25)
S calls (0.25)
D calls (0.25)
d raises (0.50) to 0.50
Y calls (0.50)
a calls (0.50)
l folds.
g folds.
C folds.
hero ???

My thoughts are: If I make a pair, it's weak, trips would be better. A straight is strong, but I'm already working on a gutshot and a lot less outs with that. A flush is weak. Straight flush is a pipedream.

Did I act correctly, and are my thougts good?