So, June 2015 I started Desogestrel-Ethinyl birth control; however, I only took the pills for a couple of weeks in June then stopped because of symptoms of nausea,spotting and headaches.  Anywho July "aunt flow" never came when it was due to come. Around 1am on July 31st my boyfriend and I had unprotected sex & he ejaculated inside me a lot,lot, lot. Later on Saturday in the night I spotted without any symptoms of cramps like I normally would, as the days went by "I guess aunt flow" was here for 6 days when I thought aunt flow was over during that six days, usually I have a four day aunt flow visit and it last for 6 days last week, towards the end of aunt flow from what I thought was the end it was very light & brownish for two days.

Now a week after aunt flow is gone I'm having symptoms of nausea, headaches, tired, lower cramps from right to left pelvic area, & every now & then movements in my stomach, & tight ness in my stomach could I be pregnant? 

Sorry for this long post I just don't want to spend twenty dollars on a test if I'm not pregnant. 

SOMEONE PLEASE HELP ME!! (Lol) 

By the way just turned 30 years old if that's a help. Lol