Came off of the injection and ive spotted?

Hello, I wanted to keep the question brief, but yes, i was on the injection for 6 months. Which works out I had it done twice. I hated it but got it again thinking maybe it gets better once youre used to it. Not in my case, so I came off of it.

Anyway, after coming off of it, I had 3 periods in one month. Then after a week I had another period, then after 2 weeks I had another. Last week, I spotted. Very very lightly and only for 2 days at night time. I havent come on my period yet and its been nearly 3 weeks.

My breasts are very tender, Ive been quite emotional, getting tired and spotty. All of which are symptoms of when i am about to come on, but these are also signs of pregnancy.

I am getting a test after work, just thought id get peoples views and opinions. About to come on or pregnant?

Thank you