To test or not?

My implant failed about a month ago and I’ve been ttc since then. I forgot when ovulation is but if I’m pregnant I’d be 3 weeks and 3 Days. I’m feeling sick, at 3am the slightest movement made me wanna throw up, I’ve got bad stomach pains and more. Certain foods I used to love make me sick and I’ve got yellow and white discharge. I can’t get a test until Friday because I live quite far from a store. I’m only 16, 17 in October. No hate please. I’ve finished school and I’m working full time. I think I can support this baby. I got my implant out Monday if that’s helpful.