Yes it is ok to drink one to two cups of coffee daily. No more than that because coffee itself is a diuretic (water retainer) and your ankles will swell and blow up on you.... :)
not really but you will swell more and be much more uncomfortable the more things you consume that make you retain water.
You need to make sure that daddy is massaging your ankles and feet regularly. This will help to reduce swelling and make sure that you do not run into circulation troubles as the prgnancy progresses.
Definatly enjoy life, food and drink but do so in moderation. (no alcohol but virgin daquiris and margaritia's with lots of whipped cream and sugar) have fun, you only get to be pregnant a couple times in a life time. Make the most of it!