Alesse 28 !!!

I'm on Alesse for 3 months now going on the fourth but I'm very very scared that I will gain weight ! Is it actually true you put on weight ? I don't eat a lot as I sometimes don't even feel hunger also I see my body swollen and should be getting my period in 3-5 days my breasts hurts and have been swollen for a week now ! Also aside from the possibility of gaining weight is it true the breasts will grow ? Please help me I'm very scared as I don't want bigger breasts or to gain weight