Should I test again

lizzie • long live

My nexoplan expired 2 months ago and I've been waiting on my doctor to get back with me me and my fiance are 21 and 20 and at first we had been trying to prevent the best we could but condoms are expensive thanks to the tax my area has on them so we haven't been using them last month I took a pregnancy test and it came back negative but I was still feeling fine then but this month I haven't been able to finds anything that actually settles right and I have been extremely emotional more so them when my cycle is coming and I feel constantly nauseous like I could throw up at anytime if my period was predictable I would see if it came this month but on average I go up to 7 months without a period so I don't know what to do