I'm having bad mood swings lately?

i'm on birthcontrol, i take it consistantly, ever since i noticed these mood swings i've been sleeping regularly, i've been trying to eat regularly again, i only party once a week, i minumized my alcohol intake (only 1 or 2 drinks) and that means 1 or 2 drinks for the whole week. i take multiviatmins, i got my period on time, 6 days, but it was very light (hope i'm not preggers), the stresses that i am dealing with are: 5 college courses, i work 20-25 hours a week, and all of my earnings go directly towards my tuition+books approx $2,000. my parents help out when they can but i pay the bulk of it. i'm also in a long distance relationship and its getting hard to deal with. my bf is really supportive and i have a good relationship with him i'm just scared that it will end cuz we won't be together for another 3 years. i commute to school but manage to have a social life, have a ton of friends, and am connected with my school. im so impatient to move out but i no its not rational until i have enough $$$ im paying for school entirely by myself. im seeing a counselor. my mood swings are getting to the point where i feel bad confiding to my friends and parents aboout them. im in a goood mood today right now but i was bawling yesterday. this happened 3 times this week. in highschool i had episodes of depression where i'd stop talking to friends and avoid my family and hated school. in college when i feel that way i just push myself to be social or i force myself not to be lazy despite how im feeling and it helps. having the part time retail job reminds me that despite how i feel sometimes i still have customers to help and that helps me with my moods cuz it reminds me to suck it up. i also like my coworkers and bosses a lot. otherwise retail would suck. yeah im basically venting and cant afford a phyciatric evaluation for a couple of years. i think im either manic depressed or bipolar but im not sure. when i get pms i get super bitchy and impulsive. i try to control it or i just avoid being social that week. i also decreased my salt and suger intake cuz thats supposed to worsen pms. i just started my diet this month so it may take a while to kick in i guess. i used to fight with my mom a lot and we still have our differences but we get along better. my dad lives in another state for career reasons but my parents are still together. i guess whenever i feel in a pit of despair i just tell myself its a state of mind and i need a break and try to stay rational