will i be ok? i need advice PLEASE

so basically almost 2 weeks ago i caught a cold. for maybe 2-3 days the nights and mornings were rough but then it got better and all that it was was just my nose dripping a lot. i ended up feeling better overall. then on thursday night i woke up several times throughout the night not being able to breathe, meaning the cold got worse. i think i caught something new. another thing is that i always go to the gym and i don’t think i should be going constantly if i am fighting something meaning i wasn’t getting the rest i needed. plus its REALLY cold outside. anyways now i have a bit of a sore throat but its just in the morning and at night and i actually took the day to just spend at home and not go out and just take it easy. my parents have said this has happened to them and since i have no fever they say they don’t need to take me to the doctor. my teeth also don’t hurt and i don’t have the symptoms of a sinus infection so i don’t think its that. my friend said to go to the doctor. makes sense that she said that because i am always getting sick. i got horribly sick back in october and several times last winter. anyways do you think i should worry? should i just rest more? is this common because of winter? i hope it will be ok. i think time needed to rest tho is well needed!