Is there any possibility that I am pregnant? ?

I had unprotected sex with my fiancé using the pullout method from 2/14 to 2/27. 2/14 we did it 5 times in a row. He pulled out and wiped it off each time but then put it back in and went again. we had sex every day for the following two weeks. The night of 2/27 he finished in me. I ovulated on 2/14 as I am tracking my cycles. My normal period lasts 3 days. The day after he left, I started a normal period and it lasted 3 days and was more painful than normal. The next month I started on 3/31 (1 day later than I was supposed to) I only bled for 1 day. I spotted for a couple days after. But it was brown and it smelled different than normal spotting. I took a test on 4/2 and it was neg. but I took it in the afternoon after drinking a lot of water. I also have a 3 year old. I had all the early pregnancy symptoms so early And didn’t have a period at all with him. I’ve been feeling really odd. all of a sudden one day I could only eat half of what I would normally eat and every time I try to finish a meal I feel sick. I’ve got headaches. I also have a hip injury but lately my sciatic nerve in my back has been pinching when I bend a certain way. My low back hurts. I’ve been having really vivid dreams. I just feel off. If anyone could give me some advice or an idea of whether I can be pregnant or if it is impossible. I would love to set my mind at ease one way or the other. If I waited and took a test would it still be ne? I would really appreciate some help. Thanks in advance.