What Is Considered A Higher Dose Of Venlafaxine?

Question : i have been taking venlafaxine XXXXXXX er 37.5 mg, for about 3 weeks now. i have a hard time handling anti-depressants at a high dose, so my doctor put me on a low dose, had trouble with side effects for about 10 days, then it seens to be helping, but the last few days it doesnt seen to help me at all,i have been afraid to move it up, cause i got on the intrenet, and people said it was terriable to get off of, and ur not able to control ur emotions, i dont want to be on a strong dose, if i stay at this dose will it still help me, or is it not going to help me at all if i stay on this dose all the time, what is considered a higher dose with this medicine? i have alot of stress and anxiety, and my anxiety seens real bad now, does this medicine help with anxiety, my heart rate seens to go up alot, i wrote a health query about my self and was having trouble with side effects when i first went on it, it sent it sun, XXXXXXX 26 2014, if u need to look at it. i get scared of medicines what they can do to u. im 53 years old. i put my medical history to, if u need to see that . thank you. XXXXXXX