Switching from Lexapro to Venlafaxine

I should start out by saying that I'm new to medications and any sort of treatment. I started seeing a doctor in November, as well as a therapist. I took the lexapro at 10 mg for about two months. I felt like it was actually helping a little at first. I wasn't skipping around, but the uncontrollable crying had stopped.

Starting in December, I felt myself starting to feel worse again. Recently, I've been crying again without knowing why I'm crying or what I'm upset about. My therapist suggested upping the dose of my lexapro. I went to my doctor today and he suggested switching to 75 mg of venlafaxine.

I've never taken any medication before the lexapro, so obviously I feel immensely nervous about a new medication. I don't know what kind of side effects to expect from the switch. I don't know what will happen once I do switch or if it will help. I'm starting to want to just give up on all these medications because I'm nervous nothing is going to help and it terrifies me to not know what to expect since these medications effect everyone differently.

Has anyone else made this switch before? Or at least been on venlafaxine? I was a little nervous at the doctor's, but now that I'm home I just feel like crying over something as stupid as medication.

Yes, they're the same!

It's only been a few days and so far I'm really only feeling the side effects, which I know is normal. I've been getting really tired and dizzy when I take it and I can't seem to keep my legs still after it, which is annoying. It's also been making it hard for me to sleep without waking up constantly throughout the night. :\ I'm hoping these will go away soon.