Need advice

So, me and my bf were having a bit fun just over two weeks ago and now I am starting to feel quite nauseous all the time, and my breasts are quite sore. I was on the depo when we had sex, I know nothing is 100% effective but surely even if I was pregnant it would be too soon for any symptoms right? I know people are going to say take a test but I’m having to wait until my pay comes in from work. Anyone have any advice? Any kind and useful suggestions or comments would be greatly appreciated