Hiii girls! I really need your help..

I had intercourse with pull out method with my bf on 14th march which was the 7th day of my cycle...and I am regular on my periods...now I haven't yet got my periods my period was expected to be around 8th april...but I had my exams going on since 6th april so I was a lot stressed and didn't had enough of sleep..I had 2 homemade pregnancy test (sugar and detergent) they were negative, i don't know if they are that accurate...I was about to have the pregnancy kit test...but as I stay in hostel our bags are checked daily and also have my exams...so didn't...

Now I am having a normal white discharge...please suggest what should i do...please