The symptoms are not constant and i havnt felt sick, so im very confused?

I have recently started a new job that included a big house move also and starting shift work, which i am not used too, Myself and my partner have had unprotected sex all the time for approx a year and a half, using the 'pull out method'.

My last period was very unusual, usually i am very heavy for 5 days, last month i had pains and cramps for four days and light bleeding for two, i have recently started to feel very bloated, extremely tired all the time and have gained weight, i am going to the toilet roughly once and hour, mayby 45 minutes. Going through mood swings and had slight twinging in my left side and back. The symptoms are not constant and i havnt felt sick, so im very confused.