Throbbing cramps????

I have another question like this that hasnt been answered so im asking again. The last couple of days i get like throbbing cramps on my lower left pelvic region. They last anywhere between a couple seconds and a couple minutes. Then when they finish i get a regular cramp on my right size and what what seems like alot of clear discharge. These cramps arent painful but very uncomfortable. Im not ovulating and my period is due in about a week. I may be around 6 weeks pregnant but i havent had a chance to buy a test yet. Im 16. Any ideas would be helpful. Serious answers please