I have been with an had a horrible allergy for three whole days long and I can't breathe neither nor speak well. It's very similar to a cold.

Anyway, today I went to a barbecue with my girlfriend's family in the countryside nearby to a nearby countryside [for some reason we always refer to the countryside with the definite article], it was very comfortable to for all of us. My sister and girlfriend swam in a river but I could not even touch the water because it was freezing (exaggerating a bit). I took several pictures of the surrounding scenery, it was very beautiful.

We also ate lamb meat and different types of salad but I don't know if it had a good taste because I can't breathe well.

After all Overall, we spent had a great time, but it could have been better for me.

Excellent effort! Your mistakes are all minor and you write very well.

     I have been with had an a horrible allergy for three days, long and I can't breath neither or [nor] speak well. it's It is very similar to a cold. Anyway Today I went to a nearby countryside [park, recreation area] to for a barbecue with my girlfriend's family. to a nearby countryside It was very comfortable [relaxing] to for all of us. My sister and my girlfriend swam in a river, but I could not even touch the water because it was freezing (exaggerating a bit). I took several pictures of the surrounding scenery; it was very beautiful. We also ate lamb meat and different types of salad, but I don't [do not] know if it had a good taste tasted good, [was good, was any good] because I can't breath well. After all overall, we spent had a great time, but it could have been better for me.