Program triggering a breakpoint - c++

Question

Hey I'm having trouble figuring out what is causing my program to trigger a breakpoint. For school I had to write a class using templates that mimics a java array list, but in c++. My code seems to work when I only use the push method that I have written more than twice in a test. If I try pushing more than two values onto the arraylist, it starts triggering breakpoints.
Here's my code:
HeaderFile:
Arraylist.h
#include <string>
using namespace std;
template<class t>
class ArrayList {
public:
ArrayList();
void push_back(t m);
void erase(t m);
int size();
string toString();
t& operator[](unsigned int i);
private:
int currentIndex;
int sizeOfArray;
t *p;
int currentindex;
};
ArrayList.cpp
#include "ArrayList.h"
#include <iostream>
using namespace std;
template<class t>
ArrayList<t>::ArrayList() {
p = new t[1];
sizeOfArray = 1;
currentIndex = 0;
p[currentIndex] = 0;
currentIndex++;
}
template<class t>
int ArrayList<t>::size() {
return sizeOfArray;
}
template<class t>
void ArrayList<t>::erase(t m) {
int location = 0;
for (int i = 0; i < currentIndex; i++) {
if (p[i] == m) {
location = i;
}
}
for (int i = location; i < currentIndex - 1; i++) {
p[i] = p[i + 1];
}
currentIndex--;
}
template<class t>
void ArrayList<t>::push_back(t m) {
if (currentIndex < sizeOfArray-1) {
t *temp = new t[sizeOfArray + 1];
sizeOfArray++;
for(int i=0;i<sizeOfArray-1;i++){
temp[i] = p[i];
}
temp[currentIndex] = m;
currentIndex++;
sizeOfArray++;
delete [] p;
t *p = new t[sizeOfArray];
p = temp;
delete [] temp;
}
else {
p[currentIndex] = m;
currentIndex++;
}
}
template<class t>
t& ArrayList<t>::operator[](unsigned int i) {
return p[i];
}
template<class t>
string ArrayList<t>::toString() {
string output = "";
for (int i = 0; i < sizeof(p); i++) {
output += to_string(p[i]);
}
return output;
}
Source.cpp (just using it as a scratchpad for testing)
#include "ArrayList.cpp"
#include <iostream>
using namespace std;
int main()
{
ArrayList<double> list = ArrayList<double>();
list.push_back(1.0);
list.push_back(2.0);
list.push_back(3.0);
//list.push_back(4.0);
cout << list.toString();
cin.get();
return 0;
}
I believe that the problem has something to do with me somehow going out of bounds with one of my array's, but I can't seem to figure it out (perhaps I've just been staring at this assignment for to long). Any help, or suggestions would be much appreciated as always.