could i be pregnant? i need help ASAP!!!

Hi. Me and my partner of 3 years recently decided to start trying for a baby. Were in a great finacial position and are really happy together and really really want a baby. We've been having unprotected sex for a while now and I'm not sure if I am pregnant. After the first time we tried I took 2 pregnancy tests because my period was late but both came back negative and I received my period on the 1st of june until the 7th of june. Then on the 9th of june up until now me and my partner have been trying none stop for a baby. I have recently been going to the toilet quiet a lot and today I have had a slight bit of bleeding. I know this wasn't my period as I asked my mum and she said it looked like spotting. It also hurts quiet a bit when I use the toilet. I have also noticed a little bit of weight gain as I am quiet a slim woman and now have a bit of weight on my stomach. I really want to know if any of these things could be due to pregnancy. Please help!!