pregnancy and period symptoms are almost the same so its always hard to tell but your method of protection is definately not as effect as you would like it to be because precum still produces enough sperm to make a baby. WIth that in mind, and if you have only had one period in the last 2 and a half months, the chances of your pregnancy are high. Take a bloodtest to be sure, or take a home pregnancy tests, people just seem to doubt them after taking one, but if you believe in them, ( they are rather accurate) then take one and find out. Good luck and best of wishes