The Birth Control Patch

okay so i just had a baby 5 months ago and my boyfriend and me are sexually active. Ive been on the patch since 3 weeks after birth and i know its very uncommon to get pregnant on the patch but sometimes i cant help but wonder if i am tho? the problem is, my patch causes outrageous mood swings, nausea, cramps, and everything you can think of thats common in pregnancy. I just dont have the money for a test. Does anyone have the patch and felt like that? any feed back on the patch is more than welcome