French language Q&A Forum

Hi, I just did a test for dropping the ai part of j'ai when next to a vowel. I got this wrong but these examples were used. 

J'ai vingt ans- I am 21

Je suis grand - I am tall 

J'habite à Londre 

Why does j'ai (i thought this means I have and je suis (I thought this meant I am) both have the translation of " I am

My understanding is that J'ai mal à + noun is physical pain whereas Je suis malade is more like "I am sick" (perhaps with a flu or cold). Can you please confirm whether that is correct? 

As well, it would probably be useful to either link to a lesson that explains être malade or have another section in this lesson that explains the difference for future students!

 I am trying to find some more examples about the difference between l'an/l'année and I am now confused. For example, I want to find out whether to use l'an/l'année in "I got pregnant the same year I got married." in French. Google Translates says "Je suis tombée enceinte la même année de mon mariage." and another translation software called DeepL says "Je suis tombée enceinte l'année de mon mariage."

Are these sentences correct? If so, why do we use année instead of an? Because I am very convinced an/année indicates a particular point of time here. Thanks for answering.