my question is if Lexapro already changed from 15mg to 10mg now 5mg to get ready for the switch wasn't working for my anxiety and my doctor is changing me to Effexor 37.5 to start . i am scared to change.. or is it the best thing I can do is change if I don't think the Lexapro was working for my anxiety, is that a reason to switch and also having stomach aches in the morning and waking up with shakes.