Help not jeep

So I have been on the pill for close to 8 months now. I missed a pill on July 23 and had bleeding for a day. I again forgot August 30. I didn't have any bleeding and went on to take my placebo pills within the next week. I didn't bleed at all. I have had unprotected sex before then and during my week. Lately I have had nausea, headaches, hot and cold flashes, cramping, swollen breast, sensitivity to my nipples, my breast seem to have grown a bit, they have stretch marks on them and have had to urge to pee. I have also been very tired but can't sleep but when I do sleep, O sleep for 10+ hours? What could this be?