Im worried about being pregnant?

Im hoping somebody can help me. About a month ago i had unprotected sex with my boyfriend,2 days before this i started taking the combined pill (Microgynon 30),I took the morning after pill after this unprotected sex. I did not bleed after taking this.As a couple of weeks went by I took once pregnancy test, which came out neg. Last thursday (15th june) I had a normal looking period in my placebo week, roughly the same as any other period just maybe a little lighter. I came off my period 5 days after (I understand this is classed as a withdrawal bleed not a real period) But i'm needing to urinate quite a lot, also have tender breasts and a loss of appetite, although im not sure weather th tender breasts is from the combined pill and the other two symptoms are from worry. Please could someone help.