Could I be pregnant?

So my cycle hasn't been regular for a while in fact sometimes i go months and months without having one. At one point i was under weight and i believe that is why, that isnt the case anymore. I am also highly sensitive to stress so recently i again haven't been getting my period at all. My question is that were my cycle to start again would i be able to get pregnant without first having a period? My SO and i have been trying at least 3-4times a week for the last month and a half and for the last week ive had syptoms that feel like pregnancy. I am super emotional, i am exhausted constantly for no apparent reason, my breast hurt (especially my nipples), i have had more gas than i normally do, nausea, sensitivity to smells, headaches, lower back pain, and eating more than normal. I just dont want to get my hopes up to even the possibility if its not possible without having first had a full cycle. Thank you ladies 😘