Am i Feeling too much movement, or is this something else?

Since week 20 ive felt little movements on the sides of my lower belly but all of a sudden yesterday i feel constant fluttering very strong during the day like really sonstant and only in one spot not all over, its in my lower belly close to my pubic mound, i dont feel anything anywhere else, i know ppl say no movement is when you should worry but this is starting to worry me because its so constant ive been sitting at work for about an hour and it hasnt let up. has anyone else gone through this.