I would check my BP immediately then as you should be monitoring this and especially so if you have little to no experience with cycling. Any AAS can cause an increase in blood pressure resulting in lethargy, headaches etc so be very careful with this.
Arimidex is generally enough to take on cycle to control estrogen and is relatively inexpensive and easy to obtain. I would run initally at .25mg/day and monitor from there if you need to go up or down with it.