Anybody else feel this way? Stressed!

Im currently in college, in hopes of graduating in May. my boyfriend and I are ttc so Ill have the baby after graduation. I feel because of all my stress of classes and my petite figure we'll never get pregnant. Ive cut back on soda and starting to take vitamins to maybe help the process (as I've been told). I have a semigood handle on my life trying to juggle school and a toddler, but there is so much crazy to make everything happen for our family.